How to Uninstall Mountain Duck on Mac

Unmount Mountain Duck drives and let pending transfers finish before removal. Copy wanted files from a mounted cloud drive to a location outside that mount and open the copy; a move or deletion within the mount can propagate to the server. The recorded test used a direct download, not a Homebrew installation.

Remove the app and inspect its data

Quit Mountain Duck, then use Finder › File › Move to Trash on Mountain Duck.app, as the vendor instructs. Review its login item and any File Provider extension in System Settings. The vendor warns that bookmarks and credentials are shared with Cyberduck. The support folder can hold bookmarks. The group container and Keychain credentials may be shared with Cyberduck, so do not remove them solely because Mountain Duck left. Vendor guidance.

Check the result

ls -ld ~/Library/'Application Support'/'Mountain Duck' ~/Library/'Group Containers'/G69SCX94XU.duck

Run this read-only check after quitting the app. A printed path still exists; “No such file or directory” means that path is absent, while a permission error needs its own investigation.

If you installed it with Homebrew

The Homebrew cask has a zap list that includes Application Support/Mountain Duck, File Provider/login containers, cache and the G69SCX94XU.duck group shared with Cyberduck; manual zap does not check Mole selections. Run the command below without --zap if you want to keep those files and inspect them separately. A manual --zap follows the whole cask list regardless of Mole’s checkboxes. Mole uses zap only when its targets are selected, owned and within the checked boundary; otherwise it removes selected remnants through its own flow.

brew uninstall --cask mountain-duck

What Mole lists

The display-name support folder is for review and unselected by default. Exact bundle-ID cache and preferences are normally selected; shared Cyberduck material and protected group data need separate ownership checks.

What this test covered

Mountain Duck 5.3.2 from the official archive was removed on September 20, 2026. Cyberduck was an installed sibling; File Provider was not installed. No server mount, transfer or bookmark restoration was tested.