Transmit Disk makes your favorite Transmit servers appear as disks in the Finder. This enables you to manipulate files on your favorite servers using ordinary Finder windows.
Open the connection panel
Click the desired favorite
Click ![]()
To unmount a Transmit Disk:
Open a Finder window
Click the mounted disk
Choose Eject from the action button 
Choose Transmit > Preferences...
Click General
Check the box labeled Show Transmit Disk in menu bar
Click the icon to see a list of all your Transmit favorites. Click on a favorite to mount it as a Transmit Disk.There are also options at the bottom of the menu to open Transmit or Transmit's preferences.