Playing the game in even lowest graphics settings and low resolution (1440x900) does not generate even 25 frames per second! Very laggy. In contrast, Grid 2 Reloaded and Drift 3 with medium to high graphics settings and a higher resolution (2048x1280) plays really super without any noticable lag. I hope that these issues will get fixed with the new metal APIs implemeted in OS X El Capitain.