macOS guests
Run macOS inside macOS on Apple's Virtualization.framework — a clean system for testing installers, upgrades and anything you would rather not do to your real one.
Why it matters
Testing an installer, a migration or a beta on your only Mac is how you lose an afternoon. A disposable macOS guest that snapshots in under a millisecond turns that into a repeatable loop.
What changes
Without it
- Test on your real system and hope, or keep a spare Mac.
- Reinstall when something goes wrong.
With 1VMTool
- Snapshot the clean guest, run the risky thing, restore.
- Repeat as many times as the test needs.
What it covers
- macOS guests on Virtualization.framework
- Snapshot and restore like any other machine
- Apple limits concurrent macOS guests to two, which the app enforces rather than hides
What you get out of it
- A clean macOS to test against without a second Mac
- Reproducible installer and upgrade testing
Try it on your own Mac
Every screen states its limits before you commit to anything.