All-in-one game emulator OpenEmu has just received an update that allows you to play classic video games from PlayStation, Nintendo 64, Sega, Atari and others on your Mac. Support for 16 new consoles has been added, in addition to real time gameplay rewind, enhanced screenshot organization, improved home brew support and various interface upgrades.
These are the 16 consoles that are now supported:
Atari 5200 (Atari800) Atari 7800 (ProSystem) Atari Lynx (Mednafen) ColecoVision (CrabEmu) Famicom Disk System (Nestopia) Intellivision (Bliss) Nintendo 64 (Mupen64Plus) Odyssey²/Videopac+ (O2EM) PC-FX (Mednafen) SG-1000 (CrabEmu) Sega CD (GenesisPlus) Sony PSP (PPSSPP) Sony PlayStation (Mednafen) TurboGrafx-CD/PCE-CD (Mednafen) Vectrex (VecXGL) WonderSwan (Mednafen)
OpenEmu is totally free and can be downloaded here.