Dolphin is a free and open-source Gamecube, Wii and Triforce (the arcade machine based on the Gamecube) emulator that supports many extra features and abilities not present on the original consoles.
Gamecube and Wii compatibility is okay - one can expect "mainstream" titles to be running in some form or another; lesser known titles can be hit or miss.
Triforce compatibility is currently limited to one game - others require more of the Triforce-specific peripheral devices to be emulated. Check (and update) the Compatibility Wiki for more specific information.
Detailed instructions on how to install and use the Dolphin utility on your Mac are available HERE.
Here are some key features of "Dolphin":
· Supports DOL/ELF, Gamecube + Wii disc images / physical backup discs, Wii system menu / channels, and WADs.
· Action Replay Simulator / Gecko Code Interpreter
· Gamecube Memory Card Manager
· Real and emulated Wiimote support
· Gamepad support (including Xbox 360 pad)
· Experimental NetPlay
· Save states
Debuggers for PowerPC, DSP, and graphics processors:
· Interpreters and recompilers for each processor
· OpenGL, DirectX, and software renderers with graphical enhancements and debugging features.
· Fast modern CPU with SSE2. Dual core for a speed boost.
· Any reasonable modern GPU with Pixel Shader 2.0 or greater. nVidia or ATI are good. Integrated Intel chips won't work.
What's New in This Release: [ read full changelog ]
· Gamecube BBA support: Gamecube games supporting online mode using Nintendo's BBA (ethernet adapter) can now be played online on Dolphin. This includes Mario Kart: Double Dash 8 players mode support, as well as Phantasy Star Online.
· Gamecube microphone support: The 6 Gamecube games using a microphone (Mario Party 5/6 for example) can now use your system configured microphone to get audio input.
· WBFS support: If you dumped your games as WBFS files in order to play your dumps on a real Wii, you can now use the same WBFS files on Dolphin. WBFS includes features such as compression and splitted files (to avoid the FAT32 4GB file size limit).
· Free replacement for the DSP LLE ROMs: DSP LLE normally requires you to dump ROMs from your real Wii. This free replacement, while working only with some Mario and Zelda games, removes this requirement.
· Wiimote support on OS X Mountain Lion: The latest version of Mac OS X brings several Bluetooth changes, breaking Wiimote support with Dolphin 3.0. Dol...