MAME is an extremely long-running project to accurately document and emulate virtually every computer or gaming platform known to man (well, MAME was originally

MAME is an extremely long-running project to accurately document and emulate virtually every computer or gaming platform known to man (well, MAME was originally just for arcade machines and MESS was for everything else, but they've since merged). Mac emulation in MESS/MAME has a very long history, totally independent AFAIK from any other emulators. It's also very different from most other Mac emulators, which tend towards using various hacks and high-level emulation techniques - MAME aims to be very low-level and accurate. This has perks - theoretically higher compatibility, most importantly - but also downsides that make it possibly not the best choice at the moment: worse performance, lower compatibility while the devs figure out the right way to do things, and fewer "modernizing" features that can be hacked in: instead of emulating hardware, Basilisk injects new drivers into the OS so that it can do things like give your classic Mac absurdly high resolutions or mount local directories from the host PC. MAME's flexibility - it emulates everything - also makes it notoriously difficult to configure.