FCEUX

FCEUX is an open source emulator for the 8-bit console Nintendo Entertainment System and its Japanese namesake, Super Famicom. With it, you can play almost all the games in its catalog on any Mac. It also includes a series of advanced tools that you can use to make the most of your experience.

One of the most surprising aspects of FCEUX is the ability to play with your friends through local networks or online. You can also record the game or extract the audio in real time as you play. This, coupled with a built-in code debugger and a speed modifier that changes the pace of the game, make it an especially useful program for speedrunners.

This emulator is compatible with the following NES ROM formats: NES, NFS, FDS, and UNF, although it also works well with ROMs saved as compressed files. It also lets you save games and alter detailed settings for your controls. You can even use the usual post-processing image filters to make it look like you're playing on a CRT monitor.

For all these reasons, FCEUX is one of the best ways to play classic NES games. Its ease of use and wide range of functions will please even the most demanding users when it comes to emulators.