I want to upgrade my Mac Pro 2,1 to El Capitan. If I go for an HD 5770 gpu does it have to be a Mac specific card. Are there any other compatible GPUs.


Yes, it needs to be a Mac specific card. The Mac specific part is basically the firmware on the card - so some cards can be purchased in the PC/Windows variant and then you reflash the firmware to make it Mac specific again.

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