Update MacOS version from 14 to 15 in CI runners

.github/workflows/iOS.yml

@@ -28,7 +28,7 @@ jobs:
     # well on Windows or Mac.  You can convert this to a matrix build if you need
     # cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: macos-14
+    runs-on: macos-15
 
     steps:
     - uses: actions/checkout@v7

.github/workflows/macOS_arm64.yml

@@ -25,7 +25,7 @@ concurrency:
 
 jobs:
   build:
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
     - uses: actions/checkout@v7
       with: