You must enable the game console in the options tab then bring it up using the key above the tab and to the left of the 1. You must then type cg_drawFPS and set it to 1. If you are on a 2GHz mini then more then likely you are running a 9400m. You will be lucky to get 30FPS with everything set to low and a low resolution. My 2010 macbook air is getting average 32FPS at 1600x900 (connected to ACD) and low settings with high texture settings.