RLVM is a Reallive emulator that allows one to play games by Visual Arts (primarily the works of Key) on Mac or Linux. Right now it only works with a couple games including Planetarian (unvoiced edition) and Kanon Standard Edition (and the All Ages variant...why did I buy that XP). Possibly Air SE but I haven't tried.
It may only work with a couple games but it works WELL:
Yes the opening video works!
It has a nicer right-click menu than the original does.
Of course the novel part works too ^_^
-Tomoyo After (demo) won't show the title screen
-SEEN files not in SEEN.txt are ignored (RealLive.exe opts to use these files over SEEN.txt)
- No voice support yet
- The Mac-specific +Q is not supported yet
As you can see from behind the game in some shots... you just run the application and select a game. Nothing complicated, RLVM doesn't even need to be in the game directory.