Snes9x one of the best SNES emulators available recently got updated to version 1.53. Reason enough to play "Legend of Zelda, a Link to the Past" again and review the OS X port.
Snes9x is around for many years now, started in 1996 as Snes96 and renamed to Snes9x after merging with Snes97. After becoming open source in 1999 Snes9x has been unofficially ported to more platforms than any other emulator.
After you start the application you get no visible window until you open a rom from the menu bar.
Some "Welcome" window like in Boxer would be great but guess its just a 1:1 port of the Windows version.
After loading a rom the game starts and you are ready to play, if you click in the game window the game pauses which was confusing. You are supposed to just click on the window bar or resume the game once you clicked inside with ⌘+R.
Clicking the green maximize button in the window bar cycles through the available resolutions which is quite nice, but to switch to fullscreen you have to go to the preferences. A shortcut would be really handy.
The emulator supports all kind of filters to "improve" the graphics or add some effects to be nostalgic about like, scanlines :)
The keyboard config is pretty clever, you can drag'n'drop the gamepad buttons to the keys you want to use.
The emulator has all kind of features you would expect nowadays like save stats, recording, cheat finder and netplay (crossplattform). Speed and compatibility are excellent as well. A slightly better Mac integration would be great but even with some lacks in the gui it is still the best Super Nintendo emulator for the Mac.