Looking at the steam registry link[1] posted by Breakthrough, it looks like there is a mention of osx in the app. [1] http://cdr.xpaw.ru/app/70/ http://cdr.xpa

Looking at the steam registry link[1] posted by Breakthrough, it looks like there is a mention of osx in the app. [1] http://cdr.xpaw.ru/app/70/ http://cdr.xpaw.ru/app/70/ Edit: I opened Steam on my mac, Half-Life is showing up under "Mac games," I'm downloading it now. Great.