I am running Killing Floor in Crossover Games for Mac 7.1 due to problems I have experienced with the latest version of Crossover with Killing Floor and Audiosurf. I am able to start a solo game and the mouse pretty much works except sometimes you have to move it around the screen a bit to force it to go where you want. After about 10-20 seconds, the textures start to turn green and the game freezes.