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Snapshots

Copy-on-Write on APFS

Nemeton creates snapshots as copy-on-write clones on APFS. This makes snapshots near-instant and uses minimal additional disk space.

A snapshot captures the complete disk state:

  • Disk image (.img)
  • EFI variables (efi_vars.bin)
  • Auxiliary storage (for macOS VMs)

Creating a Snapshot

The VM must be stopped. In the snapshot view within the VM details, create a new snapshot with an optional name and description.

Restoring a Snapshot

When restoring, the current disk state is replaced with the snapshot's state. Nemeton checks available disk space beforehand. The VM must be stopped.

Deleting a Snapshot

Snapshots can be deleted individually. The snapshot directory and metadata are removed.

Limitations

  • Maximum 10 snapshots per VM (configurable in settings, 1–50)
  • All snapshot operations require a stopped VM
  • Snapshots are stored under ~/Library/Application Support/Nemeton/VMs/{VMName}/snapshots/