DiskPeek, the macOS disk scanner with no patience for mystery

Field notes

The described workflow begins showing a folder tree before the scan completes, allowing users to drill down while totals continue changing. The page highlights keyboard navigation, Finder-like columns, and separate logical versus allocated sizes, including a 4.0 GB versus 7.3 GB example. It also states that deleting an item updates parent totals without another scan, while warning that APFS may not return all deleted space to the user.