I just received my GT 120 video card today and I installed it in my 2008 Mac Pro. It works and now I can use my new Apple 24" Display with my 30" Display. My ATI 2600 didn't have the Mini DisplayPort and thus I had to spend $150 to get this video card. If anyone who has a 2008 mac pro and is thinking of upgrading to a GT 120 video card, please do so. It works, even though the apple site says the opposite.