GeoMAME (for NeoGeo only) is pretty much a port to the Mac of some of the crucial enhancements PC users have had in their MAME derivatives, such as autofire and user-configurable overclocking. Thanks to Emu+ team's wonderful source code, i've been able to add these features to the Mac Version.
Our Review: GeoMAME is an emulator program for the Mac that allows you to import game ROMs from NeoGeo games machines. GeoMAME supports joysticks (including autofire), replays, and it also has the ability to save games. GeoMAME is only an emulator and does not include the BIOS files or game ROMs necessary to play NeoGeo on your Mac.