Time Machine local snapshot hides space freed by deletions

If free space doesn't move after deleting tens of GB on macOS, check tmutil listlocalsnapshots /. With AutoBackup=1 and the backup disk unplugged, macOS takes local snapshots (com.apple.TimeMachine.<date>.local) that pin everything deleted afterward for up to about 24 hours. sudo tmutil deletelocalsnapshots <YYYY-MM-DD-HHMMSS> released it immediately; available space went from 73 GB to 105 GB here. tmutil latestbackup failing with Failed to mount destination (Code=18) is a sign that the destination is absent. Claude Code's auto-mode classifier may block the snapshot delete as irreversible, so have the user run it.