To get started, be sure that your Dock position is already set to the left or right. You can do this via the Apple menu (Apple -> Dock -> Position). Next, open Terminal and enter one of the following commands: pins Dock to bottom corner pins Dock to top corner You’ll then need to restart the Dock by entering this Terminal command: If you want to put the Dock back in it’s default center position, you’ll need to enter this command in Terminal: Don’t forget to restart the Dock again: Which position is your favorite for the Mac Dock? via The Sweet Setup