Gaming question

I don't know if I actually want to do this...but if I wanted to play a video RPG, absolutely not multi-player, questish, on my MacBook Air, does anyone have any suggestions?  Back in the day, I loved the look of Myst, but was not clever enough to solve most of the puzzles, and just bogged down.  I absolutely do not want a first person shooter, and would prefer there be only some fighting.  Fantasy or medieval setting preferred, sf ok, post-apocalyptic right out.  Oh, and I do not want to buy any additional hardware.  I don't care if this is an old game that everyone else is already bored of.  I game so very little, it would be novel to me.

Any suggestions?