here is a link for dlphin (gamecube and wii emulator) 3.0:

Mac OS X:
http://www.dolphin-emulator.com/download.html

32bit:
http://www.dolphin-emulator.com/down...&bit=32&os=win

64bit:
http://www.dolphin-emulator.com/down...&bit=64&os=win

if you´ve got problems with configuring it this video may help you out:
http://www.youtube.com/watch?v=UV4zgZUO0OM