ThisMac,
I will ask the team if there are more supported graphics cards that they are trying to add to the game. I know that they had pushed out 1.2.8 to add some more common cards but with a non Apple officially supported card I don't know. That being said it never hurts for me to ask them. I know they could add support but if only a very few people have that card they would most likley have that at a lower priority over a more common system setup.
I will post any update I get from them. Hope for the best.
thanks,
kofs79