I just downloaded Garry's Mod from Steam and every time I try to play Single Player on the first map, it crashes on the Loading Resources section of the progress bar.
Here is some of the exception information the system prints out:
Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x000000001acec4d0 Crashed Thread: 4
When I ran it on the Windows side (Bootcamp), Windows 7 required me to give Garry's Mod some permissions. I wasn't asked to do this on the Mac side. Maybe that's it?
Is there some kind of special setup for the Mac?