diff --git a/browser/base/content/test/performance/browser.toml b/browser/base/content/test/performance/browser.toml
index bf051f119018..3f27c3706655 100644
--- a/browser/base/content/test/performance/browser.toml
+++ b/browser/base/content/test/performance/browser.toml
@@ -85,6 +85,7 @@ skip-if = [
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1594274
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1705492
   "os == 'linux' && os_version == '18.04' && processor == 'x86_64' && opt", # Bug 1705492
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt", # Bug 1870476
 ]
 
 ["browser_tabopen_squeeze.js"]
diff --git a/browser/base/content/test/webrtc/browser.toml b/browser/base/content/test/webrtc/browser.toml
index f28f601d43e1..862eae3ad4ed 100644
--- a/browser/base/content/test/webrtc/browser.toml
+++ b/browser/base/content/test/webrtc/browser.toml
@@ -22,8 +22,9 @@ prefs = [
 ["browser_device_controls_menus.js"]
 skip-if = [
   "debug", # bug 1369731
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media.js"]
@@ -51,8 +52,9 @@ skip-if = [
 https_first_disabled = true
 skip-if = [
   "debug", # bug 1369731
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media_in_xorigin_frame_chain.js"]
@@ -62,8 +64,9 @@ https_first_disabled = true
 https_first_disabled = true
 skip-if = [
   "debug && os == 'win'", # bug 1393761
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media_paused.js"]
@@ -71,8 +74,9 @@ https_first_disabled = true
 skip-if = [
   "os == 'win' && !debug", # Bug 1440900
   "os =='linux' && !debug && bits == 64", # Bug 1440900
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",  # bug 1707735
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #  bug 1707735
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media_queue_request.js"]
@@ -86,15 +90,17 @@ skip-if = [
 https_first_disabled = true
 skip-if = [
   "os == 'linux'", # Bug 1503991
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
   "os == 'win'", # high frequency intermittent, bug 1739107
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media_screen_tab_close.js"]
 skip-if = [
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_devices_get_user_media_tear_off_tab.js"]
@@ -126,32 +132,42 @@ skip-if = ["os == 'win' && bits == 64"] # win8: bug 1334752
 
 ["browser_indicator_popuphiding.js"]
 skip-if = [
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_macos_indicator_hiding.js"]
 run-if = ["os == 'mac' && os_version >= '14.0'"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'",
+]
 
 ["browser_notification_silencing.js"]
 skip-if = [
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_stop_sharing_button.js"]
 skip-if = [
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_stop_streams_on_indicator_close.js"]
 skip-if = [
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",   # bug 1707735
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # platform migration
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #   bug 1707735
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  platform migration
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
 ]
 
 ["browser_tab_switch_warning.js"]
 skip-if = ["os == 'mac' && os_version == '10.15' && processor == 'x86_64'"]  # platform migration
 
 ["browser_webrtc_hooks.js"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869787
+]
diff --git a/browser/components/extensions/test/browser/browser.toml b/browser/components/extensions/test/browser/browser.toml
index 08902ae12b5f..46145b328e67 100644
--- a/browser/components/extensions/test/browser/browser.toml
+++ b/browser/components/extensions/test/browser/browser.toml
@@ -609,6 +609,7 @@ skip-if = [
   "os == 'linux' && os_version == '18.04'", # Bug 1651261
   "win11_2009 && asan", # Bug 1797751
   "win11_2009 && debug", # Bug 1797751
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869793
 ]
 
 ["browser_ext_user_events.js"]
@@ -641,6 +642,7 @@ https_first_disabled = true
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1565738
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1565738
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1565738
 ]
 
 ["browser_ext_windows.js"]
@@ -675,16 +677,18 @@ https_first_disabled = true
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869793
 ]
 
 ["browser_ext_windows_update.js"]
+tags = "fullscreen"
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64' && verify",
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64' && verify",
   "os == 'mac' && os_version == '10.15' && debug", # Bug 1780998
   "os == 'linux' && os_version == '18.04'", # Bug 1533982 for linux1804
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869793
 ]
-tags = "fullscreen"
 
 ["browser_toolbar_prefers_color_scheme.js"]
 
diff --git a/browser/components/places/tests/browser/browser.toml b/browser/components/places/tests/browser/browser.toml
index 9d8da95ca588..01a0e3a472c7 100644
--- a/browser/components/places/tests/browser/browser.toml
+++ b/browser/components/places/tests/browser/browser.toml
@@ -43,6 +43,9 @@ run-if = ["os == 'mac'"] # Mac-only functionality
 ["browser_bookmarkProperties_readOnlyRoot.js"]
 
 ["browser_bookmarkProperties_remember_folders.js"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1869782
+]
 
 ["browser_bookmarkProperties_speculativeConnection.js"]
 
@@ -86,6 +89,8 @@ support-files = ["bookmarklet_windowOpen_dummy.html"]
 
 ["browser_bookmarks_change_url.js"]
 
+["browser_bookmarks_checkDefaultBookmarks.js"]
+
 ["browser_bookmarks_sidebar_search.js"]
 support-files = ["pageopeningwindow.html"]
 
@@ -95,8 +100,6 @@ support-files = ["pageopeningwindow.html"]
 
 ["browser_bookmarks_toolbar_telemetry.js"]
 
-["browser_bookmarks_checkDefaultBookmarks.js"]
-
 ["browser_bug427633_no_newfolder_if_noip.js"]
 
 ["browser_bug485100-change-case-loses-tag.js"]
diff --git a/browser/components/screenshots/tests/browser/browser.toml b/browser/components/screenshots/tests/browser/browser.toml
index a4b05e49cb91..14a741c2d991 100644
--- a/browser/components/screenshots/tests/browser/browser.toml
+++ b/browser/components/screenshots/tests/browser/browser.toml
@@ -38,8 +38,9 @@ skip-if = ["display == 'wayland'"] # sendNativeMouseEvent doesn't work on waylan
 
 ["browser_screenshots_drag_scroll_test.js"]
 skip-if = [
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64' && !debug",  # Bug 1804441
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",  # Bug 1804441
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64' && !debug", #  Bug 1804441
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #  Bug 1804441
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1869912
 ]
 
 ["browser_screenshots_drag_test.js"]
diff --git a/browser/components/sessionstore/test/browser.toml b/browser/components/sessionstore/test/browser.toml
index 4c608cbb0eea..c7b19a08e8c4 100644
--- a/browser/components/sessionstore/test/browser.toml
+++ b/browser/components/sessionstore/test/browser.toml
@@ -171,6 +171,7 @@ skip-if = [
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Disabled due to bleedover with other tests when run in regular suites; passes in "failures" jobs
   "os == 'win' && os_version == '11.2009' && processor == 'x86' && opt", # Bug 1775605
   "os == 'win' && os_version == '11.2009' && processor == 'x86_64' && opt", # Bug 1775605
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_networking", # Bug 1868915
 ]
 
 ["browser_movePendingTabToNewWindow.js"]
diff --git a/browser/components/shell/test/browser.toml b/browser/components/shell/test/browser.toml
index 3d66ce6951ad..b699e896a31a 100644
--- a/browser/components/shell/test/browser.toml
+++ b/browser/components/shell/test/browser.toml
@@ -3,8 +3,11 @@
 ["browser_1119088.js"]
 support-files = ["mac_desktop_image.py"]
 run-if = ["os == 'mac'"]
-skip-if = ["verify"]
 tags = "os_integration"
+skip-if = [
+  "verify",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869703
+]
 
 ["browser_420786.js"]
 run-if = ["os == 'linux'"]
diff --git a/browser/components/tabbrowser/test/browser/tabs/browser.toml b/browser/components/tabbrowser/test/browser/tabs/browser.toml
index d268e30a36d9..d18d0171f3de 100644
--- a/browser/components/tabbrowser/test/browser/tabs/browser.toml
+++ b/browser/components/tabbrowser/test/browser/tabs/browser.toml
@@ -233,11 +233,12 @@ support-files = [
 https_first_disabled = true
 
 ["browser_new_tab_bookmarks_toolbar_height.js"]
+support-files = ["file_observe_height_changes.html"]
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1872477
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1872477
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929417
 ]
-support-files = ["file_observe_height_changes.html"]
 
 ["browser_new_tab_in_privilegedabout_process_pref.js"]
 https_first_disabled = true
diff --git a/browser/components/textrecognition/tests/browser/browser.toml b/browser/components/textrecognition/tests/browser/browser.toml
index 12c79add6c73..88ee15e35565 100644
--- a/browser/components/textrecognition/tests/browser/browser.toml
+++ b/browser/components/textrecognition/tests/browser/browser.toml
@@ -7,6 +7,9 @@ support-files = [
 
 ["browser_textrecognition.js"]
 run-if = ["os == 'mac'"] # Mac only feature.
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929453
+]
 
 ["browser_textrecognition_no_result.js"]
 run-if = ["os == 'mac'"] # Mac only feature.
diff --git a/browser/components/urlbar/tests/browser/browser.toml b/browser/components/urlbar/tests/browser/browser.toml
index 48772c2d21b7..e98b04b3bea9 100644
--- a/browser/components/urlbar/tests/browser/browser.toml
+++ b/browser/components/urlbar/tests/browser/browser.toml
@@ -533,6 +533,9 @@ support-files = ["../../../search/test/browser/trendingSuggestionEngine.sjs"]
 ["browser_search_history_from_history_panel.js"]
 
 ["browser_secondaryActions.js"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869788
+]
 
 ["browser_selectStaleResults.js"]
 support-files = [
@@ -659,6 +662,7 @@ support-files = ["redirect_to.sjs"]
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # bug 1570474
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # bug 1570474
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # bug 1869788
 ]
 
 ["browser_urlbar_telemetry.js"]
diff --git a/devtools/client/storage/test/browser.toml b/devtools/client/storage/test/browser.toml
index 51446f3bb912..5477959e4a1b 100644
--- a/devtools/client/storage/test/browser.toml
+++ b/devtools/client/storage/test/browser.toml
@@ -138,7 +138,10 @@ skip-if = [
 ]
 
 ["browser_storage_indexeddb_hide_internal_dbs.js"]
-skip-if = ["asan"] # Bug 1591064
+skip-if = [
+  "asan", # Bug 1591064
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929421
+]
 
 ["browser_storage_indexeddb_navigation.js"]
 skip-if = [
diff --git a/devtools/client/styleeditor/test/browser.toml b/devtools/client/styleeditor/test/browser.toml
index 34cf13082657..313fd372475a 100644
--- a/devtools/client/styleeditor/test/browser.toml
+++ b/devtools/client/styleeditor/test/browser.toml
@@ -224,4 +224,7 @@ fail-if = ["a11y_checks"] # Bug 1849028 clicked element may not be focusable and
 ["browser_styleeditor_xul.js"]
 
 ["browser_toolbox_styleeditor.js"]
-skip-if = ["asan"] # Bug 1591064
+skip-if = [
+  "asan", # Bug 1591064
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929428
+]
diff --git a/devtools/client/webconsole/test/browser/_browser_console.toml b/devtools/client/webconsole/test/browser/_browser_console.toml
index bdbead709e10..f4db79d25dd3 100644
--- a/devtools/client/webconsole/test/browser/_browser_console.toml
+++ b/devtools/client/webconsole/test/browser/_browser_console.toml
@@ -108,8 +108,9 @@ skip-if = [
 
 ["browser_toolbox_console_new_process.js"]
 skip-if = [
-  "asan",  # Bug 1591590
+  "asan", #  Bug 1591590
   "debug", # Bug 1591590
-  "ccov",  # Bug 1591590
+  "ccov", #  Bug 1591590
   "os == 'win' && bits == 64 && opt", # Bug 1591590
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt", # Bug 1929454
 ]
diff --git a/devtools/shared/commands/target/tests/browser.toml b/devtools/shared/commands/target/tests/browser.toml
index 3a0c59de6f6c..80475ef70a64 100644
--- a/devtools/shared/commands/target/tests/browser.toml
+++ b/devtools/shared/commands/target/tests/browser.toml
@@ -30,6 +30,7 @@ support-files = [
 skip-if = [
   "os == 'linux' && !fission" # Bug 1855067
 ]
+
 ["browser_target_command_getAllTargets.js"]
 
 ["browser_target_command_invalid_api_usage.js"]
@@ -50,6 +51,7 @@ skip-if = [
 skip-if = [
   "os == 'linux'", # Bug 1767781
   "win11_2009", # Bug 1767781
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929449
 ]
 
 ["browser_target_command_switchToTarget.js"]
diff --git a/devtools/startup/tests/browser/browser.toml b/devtools/startup/tests/browser/browser.toml
index ff9433663f4c..e31038decae2 100644
--- a/devtools/startup/tests/browser/browser.toml
+++ b/devtools/startup/tests/browser/browser.toml
@@ -7,5 +7,8 @@ support-files = [
 ]
 
 ["browser_command_line_urls.js"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929427
+]
 
 ["browser_shim_disable_devtools.js"]
diff --git a/dom/base/test/browser.toml b/dom/base/test/browser.toml
index 1b014e4ce377..9cc378594ed6 100644
--- a/dom/base/test/browser.toml
+++ b/dom/base/test/browser.toml
@@ -73,6 +73,7 @@ skip-if = [
   "os == 'win'", # Bug 1692963
   "os == 'linux' && os_version == '18.04' && processor == 'x86_64' && opt && socketprocess_networking", # Bug 1775696
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64' && opt", # Bug 1775696
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929448
 ]
 
 ["browser_bug1703472.js"]
diff --git a/dom/base/test/fullscreen/mochitest.toml b/dom/base/test/fullscreen/mochitest.toml
index 69bb2a28056a..0192288d2122 100644
--- a/dom/base/test/fullscreen/mochitest.toml
+++ b/dom/base/test/fullscreen/mochitest.toml
@@ -49,16 +49,18 @@ allow_xul_xbl = true  # XUL is used in file_fullscreen-api.html
 skip-if = [
   "os == 'android'",
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1579623, 1776996
-  "display == 'wayland' && os_version == '22.04'",  # Bug 1857240
+  "display == 'wayland' && os_version == '22.04'", #  Bug 1857240
   "http3",
   "http2",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929452
 ]
 
 ["test_fullscreen_meta_viewport.html"]
 
 ["test_fullscreen_modal.html"]
 skip-if = [
-  "display == 'wayland' && os_version == '22.04'",  # Bug 1857240
+  "display == 'wayland' && os_version == '22.04'", #  Bug 1857240
   "http3",
   "http2",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929452
 ]
diff --git a/dom/base/test/mochitest.toml b/dom/base/test/mochitest.toml
index 15ddaebb23b8..1ef2ab9f0c76 100644
--- a/dom/base/test/mochitest.toml
+++ b/dom/base/test/mochitest.toml
@@ -1415,6 +1415,7 @@ skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
   "os == 'linux'",
   "headless",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929448
 ]
 
 ["test_meta_refresh_referrer.html"]
@@ -1704,10 +1705,10 @@ skip-if = [
   "os == 'android'", # The test needs to run reasonably fast.
 ]
 
-["test_text_wholeText.html"]
-
 ["test_text-fragments-get-text-directive-ranges.html"]
 
+["test_text_wholeText.html"]
+
 ["test_textnode_normalize_in_selection.html"]
 
 ["test_textnode_split_in_selection.html"]
diff --git a/dom/events/test/browser.toml b/dom/events/test/browser.toml
index c06096073180..c25b10030ab5 100644
--- a/dom/events/test/browser.toml
+++ b/dom/events/test/browser.toml
@@ -9,6 +9,7 @@ support-files = [
 skip-if = [
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64' && opt",
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929440
 ]
 
 ["browser_beforeinput_by_execCommand_in_contentscript.js"]
diff --git a/dom/events/test/mochitest.toml b/dom/events/test/mochitest.toml
index 178ef3d07bf9..d982dd2c07c0 100644
--- a/dom/events/test/mochitest.toml
+++ b/dom/events/test/mochitest.toml
@@ -347,8 +347,11 @@ run-if = ["os == 'win'"] # Only Windows 1809+ supports pen input synthesis
 support-files = ["!/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js"]
 
 ["test_click_hold_context_menus.html"]
-skip-if = ["os == 'mac' && os_version == '10.15' && processor == 'x86_64'"]
 tags = "os_integration"
+skip-if = [
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929440
+]
 
 ["test_click_on_reframed_generated_text.html"]
 
@@ -496,7 +499,10 @@ skip-if = [
 ]
 
 ["test_mouse_events_after_touchend.html"]
-skip-if = ["os == 'mac' && os_version == '10.15' && processor == 'x86_64'"] # Bug 1881864
+skip-if = [
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1881864
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929440
+]
 
 ["test_mouse_over_at_removing_down_target.html"]
 
diff --git a/dom/events/test/pointerevents/chrome.toml b/dom/events/test/pointerevents/chrome.toml
index 36e54e824a3b..70d638952294 100644
--- a/dom/events/test/pointerevents/chrome.toml
+++ b/dom/events/test/pointerevents/chrome.toml
@@ -1,3 +1,6 @@
 [DEFAULT]
 
 ["test_bug1697769.xhtml"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929436
+]
diff --git a/dom/events/test/pointerevents/mochitest.toml b/dom/events/test/pointerevents/mochitest.toml
index 3e8e120fc2a3..cb267accbefd 100644
--- a/dom/events/test/pointerevents/mochitest.toml
+++ b/dom/events/test/pointerevents/mochitest.toml
@@ -89,7 +89,10 @@ skip-if = [
 ]
 
 ["test_pointermove_drag_scrollbar.html"]
-skip-if = ["os == 'android'"]  # scrollbar not showed on mobile
+skip-if = [
+  "os == 'android'", # scrollbar not showed on mobile
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929433
+]
 
 ["test_pointermove_isPrimary_subsequent_pens.html"]
 
diff --git a/dom/html/test/forms/mochitest.toml b/dom/html/test/forms/mochitest.toml
index f5dda46c24a6..c69fa5dd4af0 100644
--- a/dom/html/test/forms/mochitest.toml
+++ b/dom/html/test/forms/mochitest.toml
@@ -46,6 +46,9 @@ support-files = ["file_double_submit.html"]
 ["test_input_attributes_reflection.html"]
 
 ["test_input_color_input_change_events.html"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929441
+]
 
 ["test_input_color_picker_datalist.html"]
 
@@ -204,10 +207,16 @@ support-files = ["save_restore_custom_elements_sample.html"]
 ["test_save_restore_radio_groups.html"]
 
 ["test_select_change_event.html"]
-skip-if = ["os == 'mac' && os_version == '10.15' && processor == 'x86_64'"]
+skip-if = [
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929441
+]
 
 ["test_select_input_change_event.html"]
-skip-if = ["os == 'mac' && os_version == '10.15' && processor == 'x86_64'"]
+skip-if = [
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929441
+]
 
 ["test_select_selectedOptions.html"]
 
diff --git a/dom/html/test/mochitest.toml b/dom/html/test/mochitest.toml
index e8cb6c8e4869..1380705de45e 100644
--- a/dom/html/test/mochitest.toml
+++ b/dom/html/test/mochitest.toml
@@ -603,8 +603,9 @@ fail-if = ["xorigin"]
 ["test_bug615833.html"]
 skip-if = [
   "os == 'android'",
-  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", #TIMED_OUT # form control not selected/checked with synthesizeMouse, osx(bug 1275664)
-  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", #TIMED_OUT # form control not selected/checked with synthesizeMouse, osx(bug 1275664)
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # TIMED_OUT # form control not selected/checked with synthesizeMouse, osx(bug 1275664)
+  "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # TIMED_OUT # form control not selected/checked with synthesizeMouse, osx(bug 1275664)
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929434
 ]
 
 ["test_bug618948.html"]
diff --git a/dom/media/test/mochitest.toml b/dom/media/test/mochitest.toml
index 1b7d421fa60c..41037a9f19bc 100644
--- a/dom/media/test/mochitest.toml
+++ b/dom/media/test/mochitest.toml
@@ -843,6 +843,7 @@ skip-if = [
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1110922
   "os == 'win'", # Bug 1110922
   "os == 'android' && processor == 'aarch64'", # Bug 1110922
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug && mda_gpu", # Bug 1929426
 ]
 
 ["test_replay_metadata.html"]
diff --git a/dom/media/test/mochitest_eme.toml b/dom/media/test/mochitest_eme.toml
index fb3c12fbc694..40f4dab5c6d7 100644
--- a/dom/media/test/mochitest_eme.toml
+++ b/dom/media/test/mochitest_eme.toml
@@ -701,11 +701,13 @@ skip-if = ["os == 'android'"] # bug 1149374
 scheme = "https"
 
 ["test_eme_canvas_blocked.html"]
+scheme = "https"
 skip-if = [
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
-scheme = "https"
 
 ["test_eme_detach_reattach_same_mediakeys_during_playback.html"]
 skip-if = ["os == 'android'"] # bug 1149374
@@ -727,15 +729,25 @@ scheme = "https"
 skip-if = [
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
 
 ["test_eme_protection_query.html"]
-skip-if = ["os == 'android'"] # bug 1149374
 scheme = "https"
+skip-if = [
+  "os == 'android'", # bug 1149374
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
+]
 
 ["test_eme_pssh_in_moof.html"]
-skip-if = ["os == 'android'"] # bug 1149374
 scheme = "https"
+skip-if = [
+  "os == 'android'", # bug 1149374
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
+]
 
 ["test_eme_sample_groups_playback.html"]
 skip-if = ["os == 'android'"] # bug 1149374
@@ -752,35 +764,43 @@ scheme = "https"
 
 ["test_eme_stream_capture_blocked_case2.html"]
 tags = "mtg capturestream"
+scheme = "https"
 skip-if = [
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
-scheme = "https"
 
 ["test_eme_stream_capture_blocked_case3.html"]
 tags = "mtg capturestream"
+scheme = "https"
 skip-if = [
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
-scheme = "https"
 
 ["test_eme_unsetMediaKeys_then_capture.html"]
+scheme = "https"
 skip-if = [
   "xorigin",
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
-scheme = "https"
 
 ["test_eme_waitingforkey.html"]
+scheme = "https"
 skip-if = [
   "xorigin",
   "os == 'android'", # bug 1149374
   "apple_silicon", # bug 1707737
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929444
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929444
 ]
-scheme = "https"
 
 ["test_eme_wv_privacy.html"]
 scheme = "https"
diff --git a/dom/media/webrtc/tests/mochitests/mochitest_getusermedia.toml b/dom/media/webrtc/tests/mochitests/mochitest_getusermedia.toml
index 5e702d90094b..a38c49cfdd9e 100644
--- a/dom/media/webrtc/tests/mochitests/mochitest_getusermedia.toml
+++ b/dom/media/webrtc/tests/mochitests/mochitest_getusermedia.toml
@@ -89,8 +89,10 @@ skip-if = [
 
 ["test_getUserMedia_basicScreenshare.html"]
 skip-if = [
-  "os == 'android'",     # no screenshare on android
-  "apple_silicon",            # bug 1707742
+  "os == 'android'", #     no screenshare on android
+  "apple_silicon", #            bug 1707742
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929425
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929425
 ]
 
 ["test_getUserMedia_basicTabshare.html"]
@@ -103,7 +105,11 @@ skip-if = ["os == 'android'"] # no windowshare on android
 ["test_getUserMedia_basicVideo_playAfterLoadedmetadata.html"]
 
 ["test_getUserMedia_basicWindowshare.html"]
-skip-if = ["os == 'android'"] # no windowshare on android
+skip-if = [
+  "os == 'android'", # no windowshare on android
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929425
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929425
+]
 
 ["test_getUserMedia_bug1223696.html"]
 
diff --git a/dom/media/webrtc/tests/mochitests/mochitest_peerconnection.toml b/dom/media/webrtc/tests/mochitests/mochitest_peerconnection.toml
index 2b06ad3bae11..a7bfb3d151da 100644
--- a/dom/media/webrtc/tests/mochitests/mochitest_peerconnection.toml
+++ b/dom/media/webrtc/tests/mochitests/mochitest_peerconnection.toml
@@ -136,14 +136,22 @@ scheme = "http"
 skip-if = ["os == 'android' && is_emulator"]  # Bug 1355786, No h264 support on android emulator
 
 ["test_peerConnection_basicScreenshare.html"]
-skip-if = ["os == 'android'"] # no screenshare on android
+skip-if = [
+  "os == 'android'", # no screenshare on android
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929420
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929420
+]
 
 ["test_peerConnection_basicVideo.html"]
 
 ["test_peerConnection_basicVideoVerifyRtpHeaderExtensions.html"]
 
 ["test_peerConnection_basicWindowshare.html"]
-skip-if = ["os == 'android'"] # no screenshare on android
+skip-if = [
+  "os == 'android'", # no screenshare on android
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929420
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt && socketprocess_e10s", # Bug 1929420
+]
 
 ["test_peerConnection_bug822674.html"]
 scheme = "http"
diff --git a/dom/tests/mochitest/general/chrome.toml b/dom/tests/mochitest/general/chrome.toml
index 35665404c1f3..210a35d00137 100644
--- a/dom/tests/mochitest/general/chrome.toml
+++ b/dom/tests/mochitest/general/chrome.toml
@@ -13,6 +13,9 @@ support-files = [
   "test_offsets.css",
   "test_offsets.js",
 ]
-skip-if = ["os == 'mac' && debug"] #leaks Bug 1571583
+skip-if = [
+  "os == 'mac' && debug", # leaks Bug 1571583
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt", # Bug 1929456
+]
 
 ["test_spacetopagedown.html"]
diff --git a/dom/webauthn/tests/browser/browser.toml b/dom/webauthn/tests/browser/browser.toml
index d74d7fb808a4..525b651d24d7 100644
--- a/dom/webauthn/tests/browser/browser.toml
+++ b/dom/webauthn/tests/browser/browser.toml
@@ -27,4 +27,7 @@ run-if = ["os != 'win'"] # Test not relevant on 1903+
 
 ["browser_webauthn_prompts.js"]
 run-if = ["os != 'win'"] # Test not relevant on 1903+
-skip-if = ["os == 'linux' && os_version == '18.04' && processor == 'x86_64'"] # bug 1855383
+skip-if = [
+  "os == 'linux' && os_version == '18.04' && processor == 'x86_64'", # bug 1855383
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && opt", # Bug 1929455
+]
diff --git a/editor/libeditor/tests/mochitest.toml b/editor/libeditor/tests/mochitest.toml
index a5180c03a68d..38c282408c4b 100644
--- a/editor/libeditor/tests/mochitest.toml
+++ b/editor/libeditor/tests/mochitest.toml
@@ -27,6 +27,7 @@ skip-if = ["os == 'android'"] # Sync with test_abs_positioner_positioning_elemen
 skip-if = [
   "os == 'android'", # Bug 1525959
   "xorigin", # Inconsistent pass/fail in opt and debug
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929435
 ]
 
 ["test_backspace_vs.html"]
diff --git a/gfx/layers/apz/test/mochitest/browser.toml b/gfx/layers/apz/test/mochitest/browser.toml
index 59a589f3b6ca..d7b1665aee58 100644
--- a/gfx/layers/apz/test/mochitest/browser.toml
+++ b/gfx/layers/apz/test/mochitest/browser.toml
@@ -38,12 +38,18 @@ skip-if = [
 
 ["browser_test_position_sticky.js"]
 support-files = ["helper_position_sticky_flicker.html"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869701
+]
 
 ["browser_test_reset_scaling_zoom.js"]
 support-files = ["helper_test_reset_scaling_zoom.html"]
 
 ["browser_test_scroll_thumb_dragging.js"]
 support-files = ["helper_scroll_thumb_dragging.html"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869701
+]
 
 ["browser_test_scrollbar_in_extension_popup_window.js"]
 skip-if = ["verify"]
diff --git a/gfx/layers/apz/test/mochitest/mochitest.toml b/gfx/layers/apz/test/mochitest/mochitest.toml
index 11d5deb647e3..f92bf9bb79a9 100644
--- a/gfx/layers/apz/test/mochitest/mochitest.toml
+++ b/gfx/layers/apz/test/mochitest/mochitest.toml
@@ -46,12 +46,18 @@ run-if = [ # FIXME: enable on more desktop platforms (see bug 1608506 comment 4)
   "os == 'android'",
   "os == 'mac'",
 ]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
+]
 
 ["test_group_double_tap_zoom.html"]
 run-if = [ # FIXME: enable on more desktop platforms (see bug 1608506 comment 4)
   "os == 'android'",
   "os == 'mac'",
 ]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
+]
 
 ["test_group_fission.html"]
 
@@ -63,13 +69,14 @@ skip-if = ["os == 'android'"]  # mouse events not supported on mobile
 
 ["test_group_hittest-2.html"]
 skip-if = [
-  "os == 'android'",  # mouse events not supported on mobile
+  "os == 'android'", #  mouse events not supported on mobile
   "win11_2009 && bits == 32",
   "win11_2009 && asan",
-  "os == 'linux' && asan",  # stack is not large enough for the test
-  "display == 'wayland' && os_version == '22.04'",  # Bug 1857059
+  "os == 'linux' && asan", #  stack is not large enough for the test
+  "display == 'wayland' && os_version == '22.04'", #  Bug 1857059
   "http3",
   "http2",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
 ]
 
 ["test_group_hittest-3.html"]
@@ -95,8 +102,9 @@ run-if = ["os == 'android'"]
 
 ["test_group_mouseevents.html"]
 skip-if = [
-  "os == 'android'",  # mouse events not supported on mobile
-  "display == 'wayland' && os_version == '22.04'",  # Bug 1857059
+  "os == 'android'", #  mouse events not supported on mobile
+  "display == 'wayland' && os_version == '22.04'", #  Bug 1857059
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
 ]
 
 ["test_group_overrides.html"]
@@ -132,6 +140,7 @@ skip-if = [
   "os == 'android'", # wheel events not supported on mobile
   "http3",
   "http2",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
 ]
 
 ["test_group_scroll_snap.html"]
@@ -164,12 +173,16 @@ skip-if = ["display == 'wayland' && os_version == '22.04'"]  # Bug 1857059
 
 ["test_group_wheelevents.html"]
 skip-if = [
-  "os == 'android'",  # wheel events not supported on mobile
-  "display == 'wayland' && os_version == '22.04'",  # Bug 1857059
+  "os == 'android'", #  wheel events not supported on mobile
+  "display == 'wayland' && os_version == '22.04'", #  Bug 1857059
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
 ]
 
 ["test_group_zoom-2.html"]
-skip-if = ["os == 'win'"] # see bug 1495580 for Windows
+skip-if = [
+  "os == 'win'", # see bug 1495580 for Windows
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929429
+]
 
 ["test_group_zoom.html"]
 skip-if = ["os == 'win'"] # see bug 1495580 for Windows
diff --git a/image/test/mochitest/mochitest.toml b/image/test/mochitest/mochitest.toml
index 0c80a74fbbf9..3b11d1b53b9a 100644
--- a/image/test/mochitest/mochitest.toml
+++ b/image/test/mochitest/mochitest.toml
@@ -109,6 +109,7 @@ skip-if = [
   "os == 'win'",
   "os == 'mac' && os_version == '10.15'", # Bug 1370784, macosx due to bug 1549058
   "os == 'linux' && os_version == '18.04' && processor == 'x86_64' && opt && headless", # Bug 1776936
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929418
 ]
 
 ["test_animSVGImage2.html"]
diff --git a/layout/xul/test/chrome.toml b/layout/xul/test/chrome.toml
index f2262b3086ab..92b23b84d250 100644
--- a/layout/xul/test/chrome.toml
+++ b/layout/xul/test/chrome.toml
@@ -26,6 +26,9 @@ support-files = [
 ["test_bug477754.xhtml"]
 
 ["test_bug703150.xhtml"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929451
+]
 
 ["test_bug987230.xhtml"]
 skip-if = ["os == 'linux'"] # No native mousedown event on Linux
diff --git a/netwerk/test/unit/xpcshell.toml b/netwerk/test/unit/xpcshell.toml
index b6b3ab64100a..85e0fa9183dd 100644
--- a/netwerk/test/unit/xpcshell.toml
+++ b/netwerk/test/unit/xpcshell.toml
@@ -705,11 +705,12 @@ skip-if = [
 run-sequentially = "http3server"
 
 ["test_http3_error_before_connect.js"]
+run-sequentially = "node server exceptions dont replay well"
 skip-if = [
   "os == 'android'",
   "os == 'win' && msix", # https://bugzilla.mozilla.org/show_bug.cgi?id=1807931
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929450
 ]
-run-sequentially = "node server exceptions dont replay well"
 
 ["test_http3_fast_fallback.js"]
 skip-if = [
@@ -783,12 +784,13 @@ skip-if = [
 run-sequentially = "node server exceptions dont replay well"
 
 ["test_http3_with_third_party_roots.js"]
+run-sequentially = "node server exceptions dont replay well"
 skip-if = [
   "os == 'win'",
   "os == 'android'",
   "socketprocess_networking",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929450
 ]
-run-sequentially = "node server exceptions dont replay well"
 
 ["test_httpResponseTimeout.js"]
 skip-if = ["os == 'win' && socketprocess_networking"]
diff --git a/security/sandbox/test/browser.toml b/security/sandbox/test/browser.toml
index cd59619e9c99..99d84d84a35f 100644
--- a/security/sandbox/test/browser.toml
+++ b/security/sandbox/test/browser.toml
@@ -14,6 +14,9 @@ support-files = [
 ["browser_bug1393259.js"]
 support-files = ["bug1393259.html"]
 run-if = ["os == 'mac'"] # This is a Mac-specific test
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929424
+]
 
 ["browser_content_sandbox_fs.js"]
 skip-if = [
diff --git a/toolkit/components/pictureinpicture/tests/browser.toml b/toolkit/components/pictureinpicture/tests/browser.toml
index b1f16775a26d..3989a56d519f 100644
--- a/toolkit/components/pictureinpicture/tests/browser.toml
+++ b/toolkit/components/pictureinpicture/tests/browser.toml
@@ -83,6 +83,7 @@ run-if = ["os == 'mac'"]
 skip-if = [
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1840716
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1840716
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869710
 ]
 
 ["browser_durationChange.js"]
@@ -192,6 +193,9 @@ skip-if = ["true"] # Bug 1546455
 skip-if = ["true"] # Bug 1664920, Bug 1628777
 
 ["browser_togglePolicies.js"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1869710
+]
 
 ["browser_togglePositionChange.js"]
 
diff --git a/toolkit/components/reader/tests/browser/browser.toml b/toolkit/components/reader/tests/browser/browser.toml
index 5d967f41a095..28badb826bb2 100644
--- a/toolkit/components/reader/tests/browser/browser.toml
+++ b/toolkit/components/reader/tests/browser/browser.toml
@@ -60,14 +60,15 @@ support-files = [
 ]
 
 ["browser_readerMode_refresh.js"]
-skip-if = [
-   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1776032
-]
 
 support-files = [
   "readerModeArticleShort.html",
   "readerModeArticleTextPlain.txt",
 ]
+skip-if = [
+  "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1776032
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && debug", # Bug 1929439
+]
 
 ["browser_readerMode_remoteType.js"]
 support-files = ["readerModeArticleShort.html"]
diff --git a/toolkit/components/telemetry/tests/unit/xpcshell.toml b/toolkit/components/telemetry/tests/unit/xpcshell.toml
index 904c5c4deefb..dc6352a23f63 100644
--- a/toolkit/components/telemetry/tests/unit/xpcshell.toml
+++ b/toolkit/components/telemetry/tests/unit/xpcshell.toml
@@ -47,6 +47,7 @@ tags = "addons"
 skip-if = [
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1713329
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1707747
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929422
 ]
 
 ["test_PingAPI.js"]
@@ -148,6 +149,7 @@ run-if = ["os == 'win'"]
 
 ["test_UserInteraction_annotations.js"]
 # BHR is disabled on tsan, asan, android and outside of Nightly.
+run-sequentially = "very high failure rate in parallel"
 skip-if = [
   "debug",
   "asan",
@@ -156,10 +158,10 @@ skip-if = [
   "release_or_beta",
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # Bug 1713329
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # Bug 1707747
-  "win11_2009 && bits == 32 && !debug",  # Bug 1781452
-  "os == 'linux' && !debug",  # Bug 1781452
+  "win11_2009 && bits == 32 && !debug", #  Bug 1781452
+  "os == 'linux' && !debug", #  Bug 1781452
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929422
 ]
-run-sequentially = "very high failure rate in parallel"
 
 ["test_UtilityScalars.js"]
 run-if = ["os == 'win'"]
diff --git a/toolkit/content/tests/chrome/chrome.toml b/toolkit/content/tests/chrome/chrome.toml
index e037f45ecff4..6b2cab021fee 100644
--- a/toolkit/content/tests/chrome/chrome.toml
+++ b/toolkit/content/tests/chrome/chrome.toml
@@ -60,6 +60,7 @@ skip-if = [
   "os == 'win' && verify",
   "win10_2009", # Bug 1727507
   "win11_2009", # Bug 1797751
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
 ]
 
 ["test_autocomplete2.xhtml"]
@@ -79,12 +80,11 @@ run-if = ["os == 'mac'"]
 
 ["test_autocomplete_with_composition_on_input.html"]
 skip-if = [
-  "apple_catalina" # Bug 1784825
+  "apple_catalina", # Bug 1784825
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
 ]
-["test_browser_drop.xhtml"]
 
-["test_bug1048178.xhtml"]
-skip-if = ["apple_catalina"]
+["test_browser_drop.xhtml"]
 
 ["test_bug263683.xhtml"]
 skip-if = [
@@ -135,6 +135,12 @@ fail-if = ["os == 'linux' && os_version == '18.04'"]  # Bug 1600194
 
 ["test_bug792324.xhtml"]
 
+["test_bug1048178.xhtml"]
+skip-if = [
+  "apple_catalina",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
+]
+
 ["test_button.xhtml"]
 
 ["test_chromemargin.xhtml"]
@@ -172,7 +178,10 @@ support-files = [
 ["test_editor_for_input_with_autocomplete.html"]
 
 ["test_findbar.xhtml"]
-skip-if = ["apple_catalina"] # macosx1014/15 due to 1550078
+skip-if = [
+  "apple_catalina", # macosx1014/15 due to 1550078
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
+]
 
 ["test_findbar_entireword.xhtml"]
 
@@ -220,6 +229,9 @@ support-files = [
 ["test_menuitem_commands.xhtml"]
 
 ["test_menulist.xhtml"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
+]
 
 ["test_menulist_in_popup.xhtml"]
 
@@ -251,12 +263,16 @@ skip-if = [
 ]
 
 ["test_panel.xhtml"]
-skip-if = ["apple_catalina"] # macosx1014 due to 1550078
+skip-if = [
+  "apple_catalina", # macosx1014 due to 1550078
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
+]
 
 ["test_panel_anchoradjust.xhtml"]
 
 # test_panel_focus.xhtml won't work if the Full Keyboard Access preference is set to
 # textboxes and lists only, so skip this test on Mac
+
 ["test_panel_focus.xhtml"]
 support-files = "window_panel_focus.xhtml"
 skip-if = ["apple_catalina"]
@@ -326,6 +342,9 @@ support-files = ["window_preferences_onsyncfrompreference.xhtml"]
 ["test_screenPersistence.xhtml"]
 
 ["test_scrollbar.xhtml"]
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
+]
 
 ["test_showcaret.xhtml"]
 
@@ -341,6 +360,7 @@ support-files = ["window_preferences_onsyncfrompreference.xhtml"]
 skip-if = [
   "apple_catalina", # Bug 1141245, frequent timeouts on OSX 10.14, Windows
   "os == 'win'", # Bug 1141245, frequent timeouts on OSX 10.14, Windows
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929437
 ]
 
 ["test_tooltip_noautohide.xhtml"]
diff --git a/toolkit/content/tests/widgets/mochitest.toml b/toolkit/content/tests/widgets/mochitest.toml
index afdfe9ea8b70..5bba01b3c449 100644
--- a/toolkit/content/tests/widgets/mochitest.toml
+++ b/toolkit/content/tests/widgets/mochitest.toml
@@ -46,6 +46,9 @@ skip-if = ["os == 'mac'"]
 ["test_image_recognition_zh.html"]
 run-if = ["os == 'mac' && os_version != '10.15'"] # Mac only feature, requires > 10.15 to support multilingual results.
 tags = "os_integration"
+skip-if = [
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64' && xorigin", # Bug 1929419
+]
 
 ["test_mousecapture_area.html"]
 tags = "os_integration"
diff --git a/toolkit/modules/tests/xpcshell/xpcshell.toml b/toolkit/modules/tests/xpcshell/xpcshell.toml
index 99a2309c7405..7e128a498546 100644
--- a/toolkit/modules/tests/xpcshell/xpcshell.toml
+++ b/toolkit/modules/tests/xpcshell/xpcshell.toml
@@ -39,6 +39,7 @@ skip-if = [
   "os == 'android'",
   "os == 'mac' && os_version == '10.15' && processor == 'x86_64'", # osx: Bug 1550141
   "os == 'mac' && os_version == '11.20' && arch == 'aarch64'", # osx: Bug 1550141
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929423
 ]
 
 ["test_E10SUtils_getRemoteTypeForURIObject.js"]
diff --git a/widget/tests/chrome.toml b/widget/tests/chrome.toml
index cb08ac3bec9b..5e3b2acfe47c 100644
--- a/widget/tests/chrome.toml
+++ b/widget/tests/chrome.toml
@@ -150,6 +150,7 @@ support-files = [
 run-if = ["os == 'mac'"] # Cocoa widget test
 skip-if = [
   "verify",
+  "os == 'mac' && os_version == '14.70' && processor == 'x86_64'", # Bug 1929438
 ]
 
 ["test_native_menus.xhtml"]