Mountain Duck
Mountain Duck is the macOS / Windows companion to Cyberduck — it mounts cloud storage as a regular drive. For workflows where dragging files into Finder is more natural than running CLI commands, Mountain Duck is the cleanest experience.
Install
Download from mountainduck.io. It's a paid app (one-time license).
Configure
- Open Mountain Duck and click + to add a new bookmark.
- Choose Amazon S3 as the protocol.
- Fill in:
| Field | Value |
|---|---|
| Nickname | Filebase (or anything) |
| Server | s3.filebase.io |
| Port | 443 |
| Access Key ID | Your Filebase access key |
| Secret Access Key | Your Filebase secret key |
- Click More Options and set the Region to
auto. - Click Connect.
The bucket appears as a mounted drive in Finder (macOS) or in Explorer (Windows).
Sync vs. on-demand
Mountain Duck supports two modes:
- On-demand (default) — files are streamed from Filebase as you open them, cached locally for re-reads.
- Synchronized — all files are kept in sync between the local copy and the bucket; works offline.
For large buckets (lots of GB), on-demand is the better default.
Versions and conflicts
If two devices write to the same key concurrently, Mountain Duck handles the conflict by saving local conflicts to a .conflict.<timestamp> file, mirroring how Dropbox does it.