Step 1: Create the Dividers Open the Terminal and execute the first command to create a divider on the left or the second comment to add one on the right: # Left side

defaults write com.apple.dock persistent-apps -array-add '{tile-data={}; tile-type="spacer-tile";}'

# Right Side

defaults write com.apple.dock persistent-others -array-add '{tile-data={}; tile-type="spacer-tile";}'

Execute the command as many times as you like; a divider will be created each time. You will not, however, see them added before your eyes. Step 2: Reset the Dock Reset the dock to see your new divider(s): # Reset the dock

killall Dock

Once the dock is reset, you'll see spacers which you'll be able to drag throughout the dock. Why dividers aren't a common feature of OSX yet is a question I can't answer. Luckily we can abuse Terminal to make our dividers though.