DriveDockOSS

See what is keeping a drive busy before you eject it.

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DriveDockOSS is a native macOS utility that turns “disk in use” into useful answers: the app, process, and path still holding the drive.

See it in action

What it does

• Shows internal and external drives, capacity, model, protocol, and SMART data.
• Lists visible open handles with process, PID, access mode, and full path.
• Identifies Time Machine destinations and active backups.
• Provides a compact menu bar popover, resizable window, and five UI languages.

Safety

• Scanning is read-only, and internal drives are monitor-only.
• Eject always requires confirmation and uses normal diskutil eject.
• Ask Quit sends a normal quit request to regular GUI apps; there is no force quit or force eject.

Because lsof runs without root access, protected activity may not be visible. No listed handles is not proof that a drive is idle.

Download

Download the latest Apple silicon build from GitHub Releases. It requires macOS 15.6.1 or newer. The current build is ad-hoc signed and not notarized, so macOS may require manual approval on first launch.

Build from source

Install Xcode or Xcode Command Line Tools and ImageMagick, then run:

brew install imagemagick
make doctor
make build

See CONTRIBUTING.md for install, test, Git hook, and release workflows.

Roadmap

• Add repeatable UI smoke tests for the main inspection and eject flows.
• Improve guidance for processes that DriveDockOSS cannot close safely.
• Publish signed and notarized builds when an Apple Developer account is available.

Force quit, force eject, and a separate launch-at-login system are intentionally not planned.

License

MIT