Next question: I heard from a friend the WHOLE PC Steam library will be coming to Mac. I wonder if that means they'll hook e.g. Commander Keen into the Mac DosBox?
don't think that this will happen. the WHOLE library, I mean.
it has been confirmed that the following games will run natively on the mac:
Counter-Strike (presumably Source)
"The Half-Life Series"
Left 4 Dead
Left 4 Dead 2
Portal 2 (upcoming)
Team Fortress 2
see here for more details: forums.steampowered.com/forums/showthread.php?t=1185613
i guess what your friend meant was valves complete catalogue of games, not every single game that is available on steam.
I basically have this with Crossover anyway (needs a bit of tweaking) but a Mac version would even be better (even a Cider version that's pre-tweaked for every game, to save me time.)
that would be lots of work, don't think that valve would do all that. but i imagine, that publishers will be able to offer their games to mac users too, if they decide to tweak them so they may run.
for everything dosbox related, i can only recommend Boxer for mac. it's a really great and easy to use dosbox frontend, check it out here: boxerapp.com/
King's Quest 1-4 are supported by ScummVM, btw. not sure about classic adventures that are steam-encryptet, but there was a long discussion back when lucas arts released their games on steam and if those versions should also be supported by scummvm.
there are also fan remakes von KQ1 and 2, but only for windows i'm afraid. maybe they'll run through crossover, haven't tried that.: www.agdinteractive.com/