Wiiji is the perfect joystick solution for Wii remotes on Mac. Since i bricked my wii last year i had 2 spare Wiimotes around which where pretty useless to me. Until if found Wiiji.
With Wiiji, your Wii remotes will appear as ordinary joysticks to any application that supports joystick input. If your favorite game doesn't support joysticks, Wiiji can emulate keyboard input, too. I use it to play different emulators and it works just perfect and gives a round of Super Mario Bros 3 just the right feeling.
Setup is quite easy: install, extract drop to your applications folder and run it.