Hi All, I've just purchased a Sapphire Radeon HD 7970 from eBay and triple checking that it is compatible with my 2009 Early Mac Pro. I've been told by a Mac Facebook group that is is plug and play however the ebay seller said I need to buy a Mac specific one. There doesn't seem to be any definitive answer on this. I have a few hours till he posts it out so really need the help. He said it's a PC version and no mention of Mac. I am using the Latest El Capitan OS. Thank you.