So, up until today, Left 4 Dead was working almost at gold quality. But now it no longer loads at all. I'm working with a Leopard OS Mac and Crossover 8, and I have tried enabling GLSL, in addition to changing -dxlevel in the launch options. But instead of L4Dead, all I get is a white screen that crashes after about 15 seconds. Has something changed recently that would break the game?