I decided to put steam on my Macbook 09 unibody and had Torchlight up and running really well. Next time I tried running it, I switched the settings to Notebook mode and that's when it crashed on me. I tried restarting it and I got a popup saying: Fatal Error Steam must be running to play this game (SteamAPI_Init() failed). But I have Steam on when this happens... I've tried erasing the game and re-downloading and reinstalling but I still get the same error. Any ideas on what to do or try?