I purchased this special tool from Stew-Mac. It's a bit expensive for one project but good to have if you plan many. It will also remove the retainer clip.
Instructions are found here
Here's a link to a previous thread that show's Ole Fuzzy's homemade jack cup tool.
Disclaimer: When I say something.... always ask yourself ..... "What the hell does he know?"
I'm just not cool enough to be a Mac person.
I'm a PC and Windows 7 was my idea.