With Steam's recent sales, I purchased and downloaded Mass Effect for $5. Unfortunately, it will not run. I've got a late 2008 Unibody Macbook, and I'm running Windows XP in Bootcamp. When I try to run Mass Effect out of Steam, I get the message "This game is currently unavailable, please try again at another time". I've tried several things to fix this, including restarting and deleting the ClientRegistry.blob file. When I try to run it the file "MassEffect.exe", I get the message "This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem". I'm hesitant to try reinstalling, since downloading the game took me 2 straight nights. If I open the file "MassEffectLauncher", it brings up a little menu, with options like "Support" and "Documentation", all of which work except "Play" Has anyone else had these problems? Is there anything I can do to fix this?