I loaded up into recovery mode, and went to the command line. This might have something to do with the read-onliness of the system volume, or to do with it being the actively booted volume, but I don't know. Strangely, even though I'm using sudo to run the command as root, I'm told I have insufficient privileges. Then I tried deleting them manually: $ sudo diskutil apfs deleteSnapshot disk1s1 -uuid BFD78F4F-99BB-4D5B-AE16-5367DC9C615Eĭeleting APFS Snapshot BFD78F4F-99BB-4D5B-AE16-5367DC9C615E "com." from APFS Volume disk1s1 NOTE: This snapshot limits the minimum size of APFS Container disk1 First, I listed the APFS snapshots to see their UUIDs: $ sudo diskutil apfs listSnapshots /System/Volumes/Data The response says they were deleted, but they actually weren't: $ tmutil listlocalsnapshotdatesĪt this point, I start going the nuclear route: directly using diskutil to delete the APFS snapshots, without Time Machine's blessing to do so. $ sudo tmutil deletelocalsnapshots -214224 I tried manually deleting these: $ sudo tmutil deletelocalsnapshots -233121 In my case, there were two snapshots remaining that persisted even after thinning: $ tmutil listlocalsnapshotdates the issue is that deleting any number of snapshots won't matter if even one snapshot exists holding onto the same data. Manual snapshot deletionĪfter some number of snapshots were deleted, some space was freed up, but not much. If the system could get this to work automatically, I don't see why manually invoking it would help. Listing some number of deleted snapshots. If this succeeded, it should say something like Thinned local snapshots: This requests Time Machine to automatically clean out enough snapshots to free a desired amount of space, in this case, 100 GB. Deleting a file of X bytes would increase the size of this "hidden space" by X bytes.įirstly, I would try to manually thin out the Time Machine snapshots. Daisy Disk reports a large "hidden space".Deleting files doesn't increase free space on the disk.However, this process failed, as we'll see below. Under healthy operation, old snapshots are deleted as necessary whenever new disk space is required. The root of this issue seems to be a failure in deleting APFS snapshots made by Time Machine. Then again, you know that, you voluntarily installed a beta operating system. DO NOT PROCEED WITHOUT A BACKUP OF YOUR DATA. This seems to have worked fine for me, but there are no guarantees.
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