To all those about to say 'it's free, just update' - not an option. Yes, this laptop is still running 10.6.8. My only use of Steam on this hardware is to play these games with my fiancee while I'm on the road. Despite being 5 years old, it still plays Source games perfectly well with settings low (e.g., Portal 2), as well as other titles such as Risk of Rain and Crypt of the Necrodancer. The laptop I'm typing this on is a late-2010 Macbook Air. To Valve: I expect to maintain the ability to access the library of games I've paid for, and which currently work perfectly well, on this hardware and OS. After updating Steam today, there is a pop-up saying that 10.6 support will terminate in November 2015.
