Support

Most answers are below. If yours isn't, email support@diskscape.app and include your macOS version and, for license questions, your order number. You'll get an answer from the person who makes Diskscape.

Licenses

Where is my key? In the receipt email from FastSpring. It starts with DSK1. Search your inbox (and spam folder) for "Diskscape".

"That isn't a valid license key". Copy the whole key, from DSK1 to the end. Spaces and line breaks are fine; a missing piece isn't.

New Mac? Paste the same key there. One license covers up to 3 of your Macs. To free a Mac, use Remove License from This Mac in the license window.

Full Disk Access

Without it, macOS hides some folders (Mail, Messages, other apps' data). Open System Settings › Privacy & Security › Full Disk Access and turn on Diskscape. If it isn't listed, click + and choose it from Applications. Diskscape notices the change when you come back; if not, use Quit & Reopen in its sidebar note.

Deleted something by mistake?

Everything Diskscape removes goes to the Trash first. Use Undo right after (or Edit › Undo Last Cleanup), or drag it back from the Trash in Finder. Space is only freed once the Trash is emptied.

"System Data" is huge

Click the grey System Data & hidden block on the map. Diskscape breaks it down into swap, APFS snapshots, system volumes and folders macOS doesn't let it read, and says which parts you can do something about.

Requirements

macOS 14 Sonoma or later, on Apple silicon or Intel Macs.