OpenEmu is an open-source project whose purpose is to bring macOS game emulation into the realm of first-class citizenship. The project leverages modern macOS technologies, such as Cocoa, Metal, Core Animation, and other third-party libraries. One third-party library example is Sparkle, which is used for auto-updating. OpenEmu uses a modular architecture, allowing for game-engine plugins, allowing OpenEmu to support a host of different emulation engines and back ends while retaining the familiar macOS native front end.

Currently, OpenEmu can load the following game engines as plugins:

• Atari 2600 (Stella)
• Atari 5200 (Atari800)
• Atari 7800 (ProSystem)
• Atari Lynx (Mednafen)
• ColecoVision (CrabEmu)
• Famicom Disk System (Nestopia)
• Game Boy / Game Boy Color (Gambatte)
• Game Boy Advance (mGBA)
• GameCube (Dolphin)
• Game Gear (Genesis Plus)
• Intellivision (Bliss)
• NeoGeo Pocket (Mednafen)
• Nintendo (NES) / Famicom (FCEUX, Nestopia)
• Nintendo 64 (Mupen64Plus)
• Nintendo DS (DeSmuME)
• Odyssey² / Videopac+ (O2EM)
• PC-FX (Mednafen)
• SG-1000 (Genesis Plus)
• Sega 32X (picodrive)
• Sega CD / Mega CD (Genesis Plus)
• Sega Genesis / Mega Drive (Genesis Plus)
• Sega Master System (Genesis Plus)
• Sega Saturn (Mednafen)
• Sony PSP (PPSSPP)
• Sony PlayStation (Mednafen)
• Super Nintendo (SNES) (BSNES, Snes9x)
• TurboGrafx-16 / PC Engine (Mednafen)
• TurboGrafx-CD / PCE-CD (Mednafen)
• Vectrex (VecXGL)
• Virtual Boy (Mednafen)
• WonderSwan (Mednafen)

macOS Mojave 10.14.4

Building the default branch requires Xcode 14.3 and macOS Ventura.