Reply To: APFS Time Machine local snapshot consuming 95 GB purgeable space on M3 MacBook Air

The 95 GB “purgeable” figure represents APFS snapshot metadata pinned by the failed Xcode install (massive ~/Library/Developer/Xcode deltas), not active file data; WindowServer CPU spikes often correlate with mds/mdworker aggressively indexing these snapshot deltas during login item initialization. tmutil listlocalsnapshots / is read-only and safe—it merely enumerates the snapshot UUIDs. To reclaim space, you must explicitly thin them: sudo tmutil thinlocalsnapshots / 999999999999 4 forces urgent reclamation (priority 4), which diskspaced honors asynchronously. Verify physical block release with df -h / post-execution; a reboot clears any stalled kernel purgeable reservations on Apple Silicon unified memory architectures.