OpenEmu

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OpenEmu
Original authorJosh Weinberg
DeveloperOpenEmu Team
Stable release
2.4.1 / December 30, 2023; 2 years ago (2023-12-30)
Repository
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Written inObjective-C, Swift
Engine
    Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
    Operating systemmacOS
    Size74.0 MB
    Available inEnglish
    TypeVideo Game Emulator
    LicenseBSD
    Websiteopenemu.org

    OpenEmu is an open-source multi-system video game emulator designed for macOS. It provides a plugin interface to emulate numerous consoles' hardware, such as the Nintendo Entertainment System, Genesis, Game Boy, and many more. The architecture allows for other developers to add new cores to the base system without the need to account for specific macOS APIs.

    Version 1.0 was released on December 23, 2013, after a lengthy beta testing period.[1] Numerous incremental updates have been released since then, with plans to incorporate support for more consoles in future releases. Some of these in-development cores are available to download in an optional "experimental" cores build (released alongside the regular, "standard" version), containing support for arcade systems using MAME.

    History

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    Beginnings

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    OpenEmu was first released on Wednesday, July 4th, 2007 as OpenNestopia, a Cocoa-port written by Josh Weinberg for then Mac OS X 10.4 Tiger of the NES/Famicom emulator Nestopia (written by Martin Freij).[2] Weinberg and his friend, Ben Devacel, began searching for more developers to port other emulators to macOS, which led to the name change to OpenEmu in 2009, to better describe the multi-system emulator.[3]

    1.0

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    OpenEmu 1.0 released on Monday, December 23, 2013 with 12 "cores" emulating Nintendo, Sega, NEC, and SNK's home, tabletop, and handheld consoles from the 3rd through 7th video game console generations. OpenEmu 1.0 needed Mac OS X Lion (10.7.x) to run. A Wednesday, October 15, 2014 (296 days later) midstream update to the OpenEmu library (1.0.4) would introduce Stella, a core emulating the 2600, a 2nd generation console from Atari.

    2.0

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    Introduced on Wednesday, Dec 23, 2015, (exactly two years after 1.0) OpenEmu 2.0 was released. OpenEmu 2.0 began requiring a minimum of OS X El Capitan 10.11, dropping support for Mac OS X Lion (10.7.x) through OS X Yosemite (10.10.x). OpenEmu 2.0 introduced 16 new cores along with hundreds of bug fixes and lesser features. The new cores added several 2nd generation cores, support for optical media-based-image games, additionally emulating systems from Sony, Mattel, Bandai, Magnavox, Milton-Bradley, and Coleco. Another midstream update, 2.0.6.1, released Tuesday, Dec 19, 2017 (727 days after 2.0) added support for Mednafen's Sega Saturn branch, with a suggested quad-core i7 CPU to emulate.

    2.1 and 2.2

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    OpenEmu 2.1 (Friday, October 15, 2019, 675 days after version 2.0.6.1; "coincidentally," exactly 5 years after the 1.0.4 Stella update) was significant, not for any new cores, but for supporting Metal, Apple's visual API successor to OpenGL and OpenCl, giving OpenEmu significant gains in both performance and battery life.

    OpenEmu 2.2 (Friday December 27, 2019, 63 days later) added support for a downstream, Metal-forked version of Dolphin's GameCube branch, building on 2.1's foundation. This brings OpenEmu's number of supported cores to 31.

    Limitations

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    32X Hybrid Games

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    As confirmed by the OpenEmu developers on their official subreddit, Sega 32X-CD hybrid games (versions of games that could use a 32X cartridge and Sega CD at once, such as Night Trap, Corpse Killer, and Fahrenheit) are not supported. Users are prompted with a "This game requires the Sega 32X attachment" error if attempted.[4]

    GameCube Limitations

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    At present, GameCube emulation doesn't support Save States (due to continual updates breaking compatibility with saved states); users are encouraged to use in-game saves.

    OpenEmu GameCube emulation also does not support the 22 multi-disc GameCube titles at present (despite the main Dolphin branch doing so).

    Features

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    OpenEmu features a backend that uses multiple game engines while maintaining the familiar, native macOS frontend UI. It also uses modern macOS technologies such as Cocoa and Quartz.[5] A unique feature of OpenEmu is its ROM library, which allows one to import ROM files and view them in a gallery type setting, similar to iTunes. Game info and cover art can be automatically added from OpenEmu's databases.

    OpenEmu includes the following features:

    • High-quality Metal (formerly OpenGL) scaling, multithreaded playback, and other optimizations[6]
    • Real-time 3D effects and image processing
    • Graphic filters to enhance display
    • Full-screen support
    • Ability to play multiple ROMs at once
    • Ability to scan attached disks for ROMs
    • Automatic downloading of game info and cover art
    • Ability to use custom cover art
    • Can play ROM hacks for multiple systems.
    • A fully featured library, supporting multiple views, collections (categories), and game ratings
    • Optional automatic organization of ROM files within the library folder
    • Full save state support, including automatic save states
    • Enhanced gamepad support for USB controllers and accessibility to Bluetooth (including DualShock 3 controllers, DualShock 4 controllers, Xbox 360 controllers and Xbox One controllers)
    • Custom cores for custom systems (For systems like Wii)

    Compatibility

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    Video game console Core OE Version macOS compatibility
    10.7–10.10 10.11–10.14
    Arcade (experimental version) M.A.M.E 2.0.8 Yes Yes
    Atari 2600 Stella 1.0.4 Yes Yes
    Atari 5200 Atari800 2.0 Does not appear Yes
    Atari 7800 ProSystem 2.0 Does not appear Yes
    Atari Lynx Mednafen 2.0 Does not appear Yes
    ColecoVision CrabEmu 2.0 Does not appear Yes
    Famicom Disk System Nestopia 2.0 Does not appear Yes
    Game Boy / Color Gambatte 1.0 Yes Yes
    Game Boy Advance mGBA 1.0 Yes Yes
    GameCube** Dolphin 2.2 Does not appear Yes
    Game Gear Genesis Plus GX 1.0 Yes Yes
    Intellivision Bliss 2.0 Does not appear Yes
    Neo Geo Pocket / Color Mednafen 1.0 Yes Yes
    Nintendo 64 Mupen64Plus 2.0 Does not appear Yes
    Nintendo Entertainment System FCEUX or Nestopia* 1.0 Yes Yes
    Nintendo DS DeSmuME 1.0 Yes Yes
    Odyssey² / Videopac+ O2EM 2.0 Does not appear Yes
    PC-FX Mednafen 2.0 Does not appear Yes
    Sega 32X*** PicoDrive 1.0 Yes Yes
    Sega CD / Mega-CD*** Genesis Plus GX 2.0 Does not appear Yes
    Sega Genesis / Mega Drive Genesis Plus GX 1.0 Yes Yes
    Sega Master System / Mark III Genesis Plus GX 1.0 Yes Yes
    Sega Saturn Mednafen 2.0.6/2.0.6.1 Does not appear Yes
    Sega SG-1000 Genesis Plus GX 2.0 Does not appear Yes
    Sony PlayStation Mednafen 2.0 Does not appear Yes
    Sony PlayStation Portable PPSSPP 2.0 Does not appear Yes
    Super Nintendo Entertainment System higan or Snes9x* 1.0 Yes Yes
    TurboGrafx-16 / PC Engine / SuperGrafx Mednafen 1.0 Yes Yes
    TurboGrafx-CD / PC Engine CD Mednafen 2.0 Does not appear Yes
    Vectrex VecXGL 2.0 Does not appear Yes
    Virtual Boy Mednafen 1.0 Yes Yes
    WonderSwan / Color Mednafen 2.0 Does not appear Yes

    * Default core plugin.[7]

    ** Version 2.1 and lower must have custom system core.

    *** Unable to play the six (6) known Sega 32X CD Titles.

    Reception

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    Upon its 1.0 release, OpenEmu was positively received, and subject to much online press coverage, praising the software's UI, features, and ease of use.[8][9][10][11] In particular, it was praised by the gaming community for "[bringing] the idea of an emulator for a mainstream, general audience to reality".[12]

    As of August 16, 2018, OpenEmu has been downloaded over 10,000,000 times since its version 1.0 release, making it one of the most popular multi-system emulators on macOS.[13]

    See also

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    References

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    • OpenEmu on GitHub
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