Garry's Mod for Mac isn't ages away
Garry's Mod for Mac "isn't going to be ages away," according to creator Garry Newman. The popular Steam application is progressing, with Newman stating that it "works," but that there are bugs to work out.
Newman doesn't give a release window, but does mention in another post that he's been impressed how easy the porting process has been with the Mac version of Valve's Source engine.