Uh, what is your standard of proof... a Mac sitting on his desk in his Texas Office or a picture of a staffer using a Powerbook Mac in 2001 (that's the copyright date on the website page that links to the picture) which proves nothing about Bush owning a Mac... only that another staffer uses a Mac.
Nah got it off of another site debunking the Bush uses a Mac myth.
So you dont babble on about it being made up heres that link to the date of the powerbook and bush picture:
http://www.theapplecollection.com/various/Celebrity/GBush.html