Validated in real use. 130 GB recovered in 15 minutes during a single disk-pressure incident — at 2.1 GiB free out of 460 GiB. The cleanup involved Xcode iOS simulator runtimes the user didn't know existed, orphaned Squirrel.Mac update caches, and Audible audiobooks safely re-downloadable. None of those were findable via macOS Settings → Storage.
What MacJanitor does
Scans hidden disk hoarders that macOS Settings doesn't surface — Xcode iOS simulator runtimes, Adobe asset caches, ShipIt updater orphans, iOS device backups, Mac Catalyst app containers.
Sends only file paths and sizes to Claude (never file contents) for contextual analysis based on your stated user profile (developer, designer, casual user, etc.).
Returns a categorized cleanup plan: safe-to-delete (caches), surgical (path-confirmed), inspect (yes/no questions for ambiguous folders), and keep (never touch).
Conservative-by-default — when in doubt between "delete" and "ask," it asks. The user can escalate; they can't undo a delete.
Privacy promise
File contents NEVER leave your Mac. Only file paths and sizes are sent for analysis.
Your Anthropic API key is stored in your macOS Keychain only. Not on a server, not in plain text, not anywhere we control.
No telemetry. No analytics. No server-side component. Direct connection to Anthropic's API only.
You bring your own API key. Free credits are available at console.anthropic.com.
Requirements
macOS 14 (Sonoma) or newer. Apple Silicon recommended.
Anthropic API key (free credits at console.anthropic.com).