Crashes at first achievement, MacBook Pro (17-inch, Early 2011), AMD Radeon HD 6750M

[heidarson]

I reached the point where i get my first achievement.
The game has played perfectly this far, but now it crashes. Spinning ball, had to restart the entire computer, so about as bad as it gets...
The game has played perfectly so far, not a single glitch. Its a damn good game, and my old machine has been able to handle it like a champ, hope there is a solutions to this.