Mountain Duck
Mountain Duck is a macOS app that mounts remote servers and cloud storage in Finder so you can open, edit, and sync files like local documents.
What is Mountain Duck?
Mountain Duck is a file transfer and cloud-storage mounting app for macOS that lets you use remote storage directly in Finder. It is designed for people who work with servers, web hosting, shared storage, and cloud services and want those locations to behave more like local folders. You can open remote files in your usual Mac apps, save changes back to the server, and keep selected files available offline with synchronization. Mountain Duck also supports sharing links, file locking for collaborative editing, and client-side encryption with Cryptomator-compatible vaults. The app fits workflows that involve SFTP, WebDAV, Amazon S3, and other supported storage providers, making it useful for developers, administrators, and anyone managing files across local and remote locations. Mountain Duck is published by David Kocher.
Key features
- Mount remote servers and cloud storage as volumes in Finder
- Open and edit remote files in your usual Mac apps
- Keep selected files available offline with background synchronization
- Download files on demand to save local disk space
- Share files using temporary or signed links when supported
- Lock files to reduce conflicting edits during collaboration
- Use client-side encryption with Cryptomator-compatible vaults
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Safety overview
Status: Mostly safe
Mountain Duck is legitimate software for connecting Finder to remote storage and cloud accounts. It normally needs access to the files and services you choose to mount, and syncing or on-demand downloads are expected parts of how it works. Because it can read, upload, and update remote files, use it only with storage accounts you trust and review sync settings before working with important data. If you remove the app, mounted locations and related sync features will stop working until it is installed again.
Recommendation: Keep Mountain Duck if you use it to access remote servers or cloud storage from Finder. Remove it if you no longer need those mounted locations or sync features, understanding that any remote-drive workflow tied to the app will stop until you reinstall it.
Common paths
/Applications/Mountain Duck.app~/Applications/Mountain Duck.app
Cache paths
~/Library/Caches/io.mountainduck
Support paths
~/Library/Application Support/Mountain Duck
Preference paths
~/Library/Preferences/io.mountainduck.plist
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