Cyberduck Mountain Duck CLI

Help / Howto / Mountain Duck / Installation



Move the unzipped application bundle Mountain from the Downloads to the /Applications folder on your computer. No admin privileges for installation is required.

Mac App Store

Mountain Duck is installed through the Mac App Store in /Applications. You can always reinstall Mountain Duck on any Mac you own from the Mac App Store in  → App Store… → Purchased.

Login Item

You can choose to open Mountain Duck when you log in to your computer. The application will appear in Login Items of the User & Groups system preference pane.

Finder Extension

Enable the Mountain Duck Finder Extension in System Preferences → Extensions → Finder by selecting the checkbox. This will enable

  • Context menu items for files selected on a mounted volume with options to Reload the folder listing and copy & open URLs of files.
  • Badges on file icons to display sync status when Smart Synchronization is enabled for the bookmark.


Download the Mountain Duck Installer.exe with administrator privilege to install Mountain Duck.


Download MSI Installer for corporate environments. Requires prior installation of ​Microsoft .NET Framework 4.5.2.

System requirements

  • Mountain Duck 3.3.5 or later requires macOS 10.12 or later.
  • Mountain Duck 3.0.1 or later requires macOS 10.11 or later.

Requires .NET Framework 4.7.2. If the .NET Framework installation fails, download it manually.

  • Mountain Duck 3.2.0 or later requires Windows 7, Windows 8.1, Windows 10 (14393) or later on 64Bit.
  • Mountain Duck 3.0.1 or later requires Windows 7 or later.

Registration Key

Double click the file .mountainducklicense to open and register with Mountain Duck. Alternatively, you can copy the key with your installation routine to the application support directory.

You can manually install the registration key in

  • ~/Library/Group Containers/ Support/duck/

You can install the registration key either in

  • %APPDATA%\Cyberduck
  • C:\Program Files\Mountain Duck

Known Issues

Not a valid registration key

This error message appears if you try to use an old license key for a newer version.

Upgrade your license to the latest version of Mountain Duck or download an older version from the Mountain Duck changelog.

Upgrade Issues

After upgrading a license, a new license file will be generated.

  1. Delete the current license file from the application support folder
  2. Download the new license file from the email attachment.
  3. Apply the new license file using double-click or copy the file into the application support folder

Complete Uninstall

Follow the steps below to uninstall Mountain Duck completely.

  1. Close the application and navigate to the application folder using the shortcut ⌘⇧A. Select Mountain and delete the application by choosing File → Move to Trash.
  2. Optional Navigate to the application support folder and delete the Folder. If you changed the cache location you will have to delete that folder as well.
  3. Optional Delete all saved login credentials with Keychain
  1. Close the application and open the start menu using the shortcut Ctrl Esc. Search for Apps & Features and move to the entry Mountain Duck. Click on the application, choose Uninstall, and confirm your intentions by clicking Uninstall again.
  2. Optional Navigate to the application support folder and delete the Folder.
  3. Optional Navigate to %LocalAppData% and delete the folder Cyberduck.
  4. Optional Delete all saved login credentials with Windows Credential Manager.
Last modified on Jun 18, 2021 at 6:34:17 AM Last modified on Jun 18, 2021 6:34:17 AM

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