Symptoms
Parallels Desktop displays the following error on attempting to revert to the snapsot when the Virtual machine is running:
Unable to revert to this snapshot
Resolution
- Shut down your Virtual Machine and then try to revert to snapshot.
- If your Virtual Machine is already shut down, make sure its virtual hard disk is not mounted to Finder in Mac OS X:
- Open Finder
- Check if there are any Virtual Hard disks mounted
- Unmount virtual hard disk(s) from Finder and try to revert to a Snapshot again