Save Workspace

Save all mounted volumes when quitting to be restored while relaunching.


Change the size of the menu items in the status bar menu. Choose between Small, Medium, and Large icons.


Connect Mode

Change the default synchronization option. You can disable synchronization by default for all bookmarks by switching to Online.

Sync Preferences

Index Files

Index files on the server for a mounted connection in the background after connecting to ensure you can browse all directories when offline. Enabling this option will make sure new files available on the remote storage are detected without manually choosing Reload in the context menu.

Enable Buffering

Choose whether the file contents should be buffered or not. Unchecking the option will disable the online cache as well.

Lock Files

Enable to prevent conflicting edits when accessing documents from a shared environment. Refer to File Locking.

Mount Location

macOS only

Volumes are mounted in the Volumes folder in the application support directory. You can change the default to another folder that is writable.

Note: You cannot set it to /Volumes on macOS Mojave (10.14 or later) where the directory is not writable. The setting is not available in the version from the Mac App Store.

The default is set to ~/Library/Group Containers/ Support/duck/Volumes.

Cache Location

The disk must be formatted as HFS+ or APFS.


Select connection profiles to be installed. Either scroll through the list or use the search function to look for a specific profile. The connection profiles will be installed after ticking the corresponding checkboxes. Installed protocols are displayed in the protocol dropdown menu in the bookmark window. To disable the connection profile simply untick the checkbox.

Profiles Preferences


Enable Cache

Allow buffering file contents in a temporary location which is only deleted when quitting the application. If unchecked, opened files will not automatically be available for offline usage when using connect mode Smart Synchronization.

Login Item

Reconnect after restarting the computer. If you choose Enable Login Item and Save Workspace in Preferences → General and do not manually eject the volume prior to reboot it will reconnect after login.


An auto-update feature will alert you when a new version is available and self updates the application. Choose Preferences → Automatically check for updates. You can also choose to update to snapshot or beta builds.

  • Snapshot builds: Include the latest changes and are published continuously. These builds are not manually tested.

  • Beta builds: Published before a release and include the latest features and have been tested but might not have release quality yet.

Windows only

You receive no update notification if your user is missing administrator permission.


You can disable notifications in System Preferences → Notifications. Choose None for alert style and keep checked Show in Notification Centre. This way you will no longer be disturbed by any notification displays, but can still check back the notifications in Notification Centre anytime if required.

Hidden Configuration Options

  • Type the defaults command given in a (in /Applications/Utilities) window and restart Mountain Duck. defaults write io.mountainduck <property> <value>

  • Alternatively, create a file ~/Library/Group Containers/ Support/duck/ with the content formatted as property=value