Tidy MacPick GrandPerspective if you want a free, no-frills treemap and you can tell what each file is yourself. Pick Tidy Mac if you want the map plus answers: System Data split into named parts, each item marked Safe to clear, Worth a look or Kept, and cleaning to the Trash with undo. It’s $9.99 once, for two Macs.
Side by side
| Feature | Tidy Mac | GrandPerspective |
|---|---|---|
| Treemap of the disk | Yes (treemap and sunburst) | Yes |
| Explains what each folder is | Yes | No |
| Junk sorted by how safe it is to clear | Yes | No |
| Clean from the app, Trash first with undo | Yes | Can delete from the map |
| App uninstaller with leftovers | Yes | No |
| Price model | $9.99 once, 2 Macs | Free; small fee on the App Store |
Based on GrandPerspective’s public website, October 2026. Prices and features change; tell us if something is out of date.
Who should pick which
Pick GrandPerspective if…
- You only need to see where the space went
- You want something free and open source
- You’re comfortable identifying files yourself
Pick Tidy Mac if…
- You see a big block and want to know if it’s safe to delete
- You want hidden System Data explained, not just drawn
- You want to clean from the same window, with undo
About GrandPerspective
GrandPerspective is a long-running, open-source Mac app that shows disk usage as a treemap, where each file is a block sized by how much space it takes. It’s free from SourceForge and sold for a small fee on the Mac App Store.
Get Tidy Mac
See what fills your Mac, System Data included. $9.99 once, on two Macs, with everything going to the Trash first. Use both tools if you like.