With OpenEmu, it is extremely easy to add, browse, organize and with a compatible gamepad, play those favorite games (ROMs) you already own.
For the first time, the 'It just works' philosophy now extends to open source video game emulation on the Mac. It supports five extra sound chips and an astonishing 143 mappers. Using cycle-exact emulation, it is able to run titles that rely on precise timing, and which therefore break under other emulators. Nestopia is by far the most compatible of any NES emulator for Mac OS X. Nestopia is a Nintendo NES emulator for Mac OS X. The best part of the emulator is that, in most cases (or at least if your computer is relatively new), the graphics will be even better than they are on the original consoles.
With it, you can play virtually any game from the Nintendo catalog with no problems. Dolphin is the best emulator for Nintendo Wii and Gamecube currently available.