Unison, a powerful file synchronizer, has long been one of my favorite tools. However, installing Unison on macOS used to be a manual and sometimes cumbersome process, as detailed in my earlier guide.

The great news is that Unison is now available as a Homebrew cask! This means you can install it with a single command, leveraging the convenience and reliability of Homebrew’s package management.

To install Unison, simply run:

This command will download and install the Unison application into your /Applications folder.

After installation, you might encounter permission issues due to macOS’s security features (especially if you downloaded the app from the internet). To clear any extended attributes that might prevent Unison from launching, run:

This command removes quarantine flags and ensures Unison can start without macOS warnings.

For more details and troubleshooting tips, check out my earlier guide.