"Run without saving changes" has only been available for QEMU, where it
maps to `-snapshot`. Apple Virtualization has no such option, but
DiskImageKit on macOS 27 can stack a copy-on-write layer on top of an
image and Virtualization accepts the stacked image as a storage
attachment.
When started with the disposable option, the Apple backend now creates a
temporary directory in the sandbox and gives every writable drive an
ephemeral ASIF overlay there. The base image is opened read-only and is
never touched. The EFI variable store and the macOS auxiliary storage are
cloned into the same directory so firmware settings are not persisted
either. The directory is deleted when the guest stops or when start
fails, any leftover from a previous start is discarded before the next
start, and directories orphaned by a crash are swept at app launch.
Removable drives attached at start or hot-plugged during the run are
covered as well.
A disposable run boots fresh and leaves any saved suspend state and the
modification date alone, and reports the save/restore path as
unsupported so closing the window offers to kill the VM instead of
suspending it, matching the QEMU behaviour. The stop paths that delete a
saved suspend state skip that while running disposably.
The context menu, the Start intent and the menu bar extra now check the
backend capability instead of assuming QEMU, and the Apple display window
shows the same "Disposable Mode" subtitle as QEMU.
Assisted-by: Claude:claude-fable-5-1
- Prevent ActionNotFound by adding static action IDs
- Activate/foreground UTM when starting a VM via Shortcuts
- Index VM entities (IndexedEntity) and reindex on launch/changes for Spotlight free‑text resolution
feat(Intents): activate UTM before starting VM via Shortcut
feat(spotlight): index VM entities (IndexedEntity) and reindex on launch/changes to fix Spotlight free‑text resolution
osy