See what fills your Mac's disk and clear it safely
Storage settings shows a grey "System Data" bar and no way inside it. Scrubs maps your whole drive as a treemap, every folder sized by the space it takes, and suggests what's usually safe to clear: Xcode's DerivedData, old simulators, stale node_modules, caches and installers. Everything you delete goes to the Trash first, and ⌘Z puts it back. Native Swift, no analytics, free to scan.
Scrubs is a Mac developer tool that visualizes disk usage through a treemap, allowing users to identify and safely clear space by targeting items like Xcode's DerivedData and old simulators. It operates natively in Swift, does not collect analytics, and offers a free scanning feature.
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.