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CocoaMSX is an open source MSX emulator for OS X.



Version 1.61 is the latest stable release. View all releases.


  • Based on blueMSX, one of the most accurate MSX emulators currently available
  • Built-in support for 3 virtual systems, automatic download and installation of over 200 MSX systems
  • Built-in support for cartridge (ROM) files, optional support for diskette (DSK) and cassette (CAS) files
  • Support for pasting text directly into MSX
  • Support for MSX-Music, MSX-Audio, Moonsound, SCC and PSG sound systems
  • Various video effects, such as scanlines and signal noise simulation
  • Snapshots with Finder previews
  • Support for MSX joysticks, joypads and mice
  • Flexible keyboard and input peripheral configuration
  • Screen capture
  • Audio capture
  • Gameplay capture
  • MSX Mouse support
  • Mixing for all six sound channels (PSG, SCC, MSX-Music, MSX-Audio, Moonsound, Keyboard)
  • Full screen support, including enhanced full screen on Lion and higher
  • Automatic updates

System Requirements

Mac OS 10.7 or higher; versions 1.45 and older will also run on OS X 10.6.

Support and Updates

CocoaMSX has a dedicated wiki.