Mesen is a multi-system emulator (NES, SNES, Game Boy, PC Engine, Master System/Game Gear) for Windows, Linux and macOS built in C++ and C#.
It also includes an extensive set of debugging tools for homebrew development and romhacking.




There are many alternatives to Nestopia for Mac and since it's discontinued a lot of people are looking for a replacement. The best Mac alternative is Mesen, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Nestopia and three of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Nestopia are TetaNES and MESS.
Mesen is a multi-system emulator (NES, SNES, Game Boy, PC Engine, Master System/Game Gear) for Windows, Linux and macOS built in C++ and C#.
It also includes an extensive set of debugging tools for homebrew development and romhacking.




TetaNES is a cross-platform emulator for the Nintendo Entertainment System (NES) released in Japan in 1983 and North America in 1986, written in Rust using wgpu. It runs on Linux, macOS, Windows, and in a web browser with Web Assembly.




MESS emulates portable and console gaming systems, computer platforms and calculators. The project strives for accuracy and portability and therefore is not always the fastest emulator for any one particular system.

only 1 executable file and AIO program. Debugger, Emulator and .nsf(8 bit music) player nice.