Dusty

Dusty is a free, open-source (MIT) macOS menu bar app that reclaims disk space from caches, logs, and developer junk such as Xcode DerivedData, simulators, and npm/pip/gradle caches.

The design goal is that it cannot delete the wrong thing. The deletion engine is a separate, unit-tested Swift package, and a single validator is the only thing that can authorize a delete: a path is deletable only if it descends from a fixed allowlist of known-safe locations. Protected folders (Documents, Desktop, Photos, Mail, iCloud, Keychains) are rejected even as path prefixes, symlinks are never followed, and it stays on the boot volume and never uses sudo.

It shows every path and its exact size before you remove anything, supports a dry run, can move items to the Trash with an undo window, and writes a log of everything it deleted. No account, no telemetry. Signed and notarized by Apple, and installable via Homebrew.