PCE.js Mac Plus emulator running Mac OS System 7 - a hack by James Friend PCE.js emulates classic computers in the browser.
For all these requirements, there are Windows emulators for Mac OS that can effectively run Windows inside Mac. Newcomers to Mac OS from Windows might miss the Windows features they used to have, and even some Mac users could need something that’s only available in Windows and not in Mac.
For Mac, it works for OS 10.6 to 10.8 and is user friendly. Another advantage is it is open source and free to use. It is compatible with multiple platforms including Mac.
By far, Dolphin is the best game emulator for GameCube, Wii and Triforce games.