This card is a great product for a mac pro 1.1 and moved fairly easily. Works great, the drivers are all available on the nvidia website because not provided basic in the box to mac (basic PC card but operated as bcp mac graphics cards, from mountain lion - 10.8). Silent card, which allows to run bcp greedy apps or plug in very binding. In short, do not hesitate if you have an old bird like me mac pro 1.1, this gives a significant boost especially if you switch Mavericks with an SSD and more. My graphics software tell me thank you :)