In reply to max: I too have a MacBookPro (15) running Snow Leopard and got the older Wii to work. You may have tried this already but here is my procedure. 1. Turn off Bluetooth (if on). 2. Turn on Bluetooth but make sure “discoverable” is NOT checked. 3. Launch the Whiteboard app and try the Wii again (push buttons 1+2) 4. If you have a problem and want to try again, quit the app and delete the Wii from the Bluetooth list of devices else restarting the app will fail for sure.
Note: I used a homemade IR pen to interface directly with a 24” external monitor with Wii about 2 feet away.