You can play retro games on macOS with an emulator. An emulator imitates a console gaming system, allowing you to play console games on your Mac. With the instructions below, you can play retro games on macOS from NES, SNES, Nintendo 64, Game Boy, and a ton more.
If you try and double-click on a ROM file to open it, you might find that nothing happens. Some emulators will automatically assign the appropriate file extensions, while others will not. OpenEmu will automatically grab all the common ROM file extensions, so you can simply double-click on ROMs in Finder to launch the associated games.
Install OS X Yosemite on Supported PCs - How to install OS X 10.10 Yosemite on any supported PC from tonymacx86 using the site's own Unibeast and Multibeast software tools. For those interested in more detailed understanding of the process, the same site also provides an installation tutorial using Clover. It covers the OS X 10.10.1, 10.10.2, 10.10.3, 10.10.4, and 10.10.5 updates, too.
That's basically it for now, but more consoles could show up in the future. Provenance is already heavily based on open source code from OpenEmu and other projects, so anyone with a little patience could port other emulators without much extra work. 2b1af7f3a8