Get the app
Free download from GitHub Releases. No store and no account. The app stays on your Mac; Pro is optional and separate.
Latest Apple Silicon build v1.14.0. Free.
Requirements
macOS
Disk Headroom is a Mac app. For now, Windows and Linux are out of scope.
Apple Silicon (arm64)
The production DMG is built for Apple Silicon. Intel Macs are not supported.
First launch may need Open Anyway
Builds are signed ad-hoc until the project is notarized with an Apple Developer ID. Gatekeeper may warn on first open — that is expected for a community build. Drag Disk Headroom into Applications, then if macOS blocks it go to System Settings → Privacy & Security and choose Open Anyway. After that, grant Full Disk Access when the app asks.
What the DMG does
It installs Disk Headroom on your Mac. After a scan you review leftover groups and send what you chose to Trash — recoverable, not a one-click wipe.
What it does not do
It does not upload files, create an account, or erase anything until you confirm. Emptying Trash is still yours.
Source code
The app is open source under the MIT license.
View the repository