When I play on my PC, I can choose between DirectX9, 10, or 11. I always used 9, as it looked the least pretty but ran the best on my computer. Playing on mac, I don't get the choice between these (I know, because macs use OpenGL). On my Mac I've set the graphics to their lowest settings but the game still looks like DirectX10 does on my PC. The game also runs a little poorer for it. Is there anyway I can set the graphics to the way they are on PC, to get better performance?