I like to have my Dock organized and spacers let me do that real easy and nice.
Open up your Terminal.app (search for Terminal in Spotlight or navigate to Applications->Utilites in Finder).
Type this:
defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}' |
You can type/paste that as many times as you like to have spacers.
Then, type this to restart the Dock.
killall Dock |
Now, you can move the spacers as any other app in the Dock, and if you’d like to remove a spacer, drag it out of the Dock and wait for 1 second and release it.
