Ursprünglicher Beitrag von: Nope ,
Yes it can! Though it's as easy as with a regular PC. But iFixIt has a guide [guide|9553|here!] ''BUT'' make sure you get a card that's compatible with the iMac. A generic graphics card for a PC won't work! The best way is to get a used one on eBay or elsewhere taken from a newer Mac, as the guide writer did.