Dustloft

Dustloft is a free, open-source macOS utility that scans and displays what occupies the "System Data" category that macOS hides from users. It identifies specific items—caches, build output, old backups, Docker images, dependencies, and orphaned app files—with their full paths and actual sizes, typically recovering 50–200 GB per Mac. The app prioritizes safety by categorizing findings into regenerable items (caches, builds), admin-confirmation removals, and permanent deletions, refusing to touch system directories, synced folders, or git repositories. Built as a native macOS app with no account, subscription, or telemetry of file contents.