How do I delete or show the size of a non-TimeMachine APFS snapshot

Solution 1:

I received a reply from the author of ChronoSync, and he helpfully explained the following option to manage snapshots.

To list snapshots:

diskutil apfs listSnapshots /

To delete snapshots:

diskutil apfs deleteSnapshot / -name <name_of_snapshot>

This seems the better option, which unfortunately doesn't seem listed elsewhere (all other guides I found only mention tmutil). I couldn't test, since I already deleted it with CCC.

Solution 2:

The only tool that I am aware of that will allow you to easily view / delete APFS snapshots is Carbon Copy Cloner.

The app is meant to clone your hard drive, but it also has an interface for viewing / deleting snapshots, as shown here:

Select your drive under “Volumes” on the left and the right column will populate with all of the snapshots (I don’t happen to have any non-Time Machine snapshots, but it will show those too).