Adding a Blank Space to the Mac OSX Dock

Sometimes you may want to add a blank space to the OSX Dock to better organize applications.

From the terminal window, you can do:

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

Your desktop will go black for a few seconds and close the dock. It will then reappear with a blank space on the far right, which you can drag to move just like any other app icon.