Using X11 Forwarding on a Mac

X11 used to be included with macOS. Apple no longer includes X11 with macOS but it can be downloaded from the website below. It is now maintained by a third party that has renamed it "XQuartz".

Configuring your Mac for X11

1. Download XQuartz here.
2. Open the .dmg file and run the .pkg installer.
3. Click "Continue" three times.
4. Agree to the License Agreement.
5. Click "Install". It will ask for your password.
6. Once you see the "Installation Complete" screen you can close the installer.
7. XQuartz is now installed on your computer. No further configuration is required. The icon looks like this: 
8. Open XQuartz. It does the same thing as the built-in terminal, but includes X11 forwarding. 
9. You log in to the cluster the same way you would using the built-in terminal.