Left 4 Dead 2 crashes on launch I'm now getting an hl2_osx error when i try and launch Left 4 Dead 2. It crashes a few seconds after start-up. I had been playing this game for quite a few weeks and it worked fine. I've verified integrity of data cache and that reports no problems. I've deleted and re-installed twice. Still not working.
I'm running it on a MacBook Pro mid 2009 Nvidia GeForce 9400M 256mb 8gb ram OS X Lion 10.7.5