Things You'll Need
Instructions
Connect the single plug on one end of the audio video cable supplied with the Wii to the port on the back of your game console.
Connect the red, green and blue video plugs on the other end of the Wii cable to the matching jacks on the DVI adapter cable. Plug in the other end of the adapter--which has a rectangular plug with three rows of metal pins--into the DVI port on the back of the iMac.
Connect the red and white audio plugs on the Wii cable to the two jacks on the Y-adapter. Insert the red plug in the adapter jack labeled "R."
Insert the mini stereo plug on the other end of the Y-adapter into the audio line-in jack on the back of the iMac.