Before connecting to mason.gmu.edu, you will need to set the Default protocol under Connection to SFTP (SSH File Transfer): CyberDuck > Preferences > General > Connection

Step 1

Open the CyberDuck client.

Step 2

Select Open Connection in the upper, left-hand corner.

Step 3

Enter mason.gmu.edu for the Server name. (Note: port should be set to 22.)

Step 4

Enter your username and password.

Step 5

Select Connect.

Step 6

Once you have created your folder(s) under public_html, you can drag and drop folders between CyberDuck and Finder.

For CyberDuck support, see CyberDuck Help.