I guess it all depends on valves attitude to how games are adapted to work on a mac. While valve are setting the example and properly porting source to OS X, a lot of games you see for sale in the Apple store are ported using a wrapper called 'cider'.
It's not the best way to do it (it's akin to using crossover games or attempting to run a game in parallels, just a little more efficient) but if valve is happy to allow games into it's store using 'cider' we could se A LOT of the existing steam games 'ported' over to the mac.
It's not the best way to do it (it's akin to using crossover games or attempting to run a game in parallels, just a little more efficient) but if valve is happy to allow games into it's store using 'cider' we could se A LOT of the existing steam games 'ported' over to the mac.