Of the handful of NES emulators available for the Mac, I suggest using Nestopia or Maciform. If you’re one of those folks who want to set up an NES emulator on a Mac here’s what you need to do.
It used to be that you could only emulate the NES on a PC, but some crafty developers have made it possible to emulate the NES on a Mac. In fact, I play NES games way more than I do games on my Xbox 360. I love Baseball Stars, Final Fantasy, Tecmo Bowl, and Swords and Serpents. I love the 8-bit Nintendo Entertainment System.