Spacewalk

What it does

• Used, purgeable and free space

  Overview splits the disk into used, purgeable and free space. Below the bar it lists the biggest folders and files from your last scan.

• A treemap for any folder

  Explore shows a drill-down treemap next to a sorted list. Right-click an item to reveal it in Finder, open it or move it to the Trash.

• 14 cleanup targets in three groups

  They cover caches, logs, Xcode DerivedData, package-manager caches, device backups and old downloads. Any node_modules and virtualenv folders the scan finds come up for review too.

• Review large files with the arrow keys

  Files of 100 MB and up, downloads older than 30 days and apps appear as cards. Left arrow deletes, right arrow keeps, space opens Quick Look and Cmd-Z undoes.

• Swiped files land in the Trash

  Only caches that rebuild themselves are deleted permanently, and only after you confirm. Spacewalk remembers the items you kept for your next session.

• Each byte counted once

  The scanner runs on all cores and counts allocated bytes. It counts hard-linked files once and skips other volumes and firmlink views, so a whole-disk scan does not double count.