Diskscape draws your whole disk as one treemap. The biggest folder is the biggest box, so whatever is eating your space is the first thing you see. It scans about 200,000 files a second, lists node_modules, Xcode DerivedData, simulator caches and old large files under Worth a look, and its sizes match Finder, with no double-counted APFS volumes. Native Swift, sandboxed, nothing leaves your Mac. Free to scan; Move to Trash is a subscription after 7 days of use.
