A MBPro with a 250GB running the latest Mojave suddenly went from 100GB+ of free space to 5GB and is warning us about running out. Looking at About>Storage>Manage, it seems most of the occupied space is System (168GB worth). Looking at things via the Finder, we only see about 90GB of stuff total and only 9GB in the System directory and 6GB in the main Library folder. Running OmniDiskSweeper with the sudo command via Terminal, it confirms what the Finder is reporting…that there should be about 90GB instead of 245GB of stuff. We also ran GrandPerspective and it does not “see” any inordinately large files.
Researching a bit, I found some possibilities that haven’t panned out. 1. it’s NOT local TimeMachine snapshots, as was the answer for some people 2. it’s NOT a runaway Spotlight index, as it was for some people 3. running TimeMachine did NOT clean things up, as reported by some 4. revealing hidden files did NOT reveal anything out of the ordinary 5. booting into Recovery Mode and running Disk Repair reported everything fine
Some have thrown their hands up wiped out their hard drive and reinstalled (which has fixed this issue for some).
The problem is, my friend with this laptop is traveling thru Europe and is not technically savvy. So, talking her through a full reinstall will be a big challenge.
There must be SOME way to see what’s occupying the space. It would seem to me that perhaps there’s some that went wrong with the recent conversion from HFS+ to APFS when she installed Mojave.
Any ideas on how to reclaim the space without reinstalling from scratch?