THIS WORKS FOR PC AND MACS
What you need
1 Wii
2 SD card
3 WinRar( http://downloads.yahoo.com/software/download/windows/410458 )
First make sure wii is on ver 4.3. You can check this by going to the Wii button in the bottom left hand corner in your wii menu. After you click that click wii settings the version will be in the top right hand corner. If the version is lower than update your wii by clicking over twice and press update.
After that go back to wii settings and go over once click internet and then console information. Copy the mac address and enter it here http://please.hackmii.com/ and check the right system menu version. Click cut the red wire or blue wire it dosent matter. This will cause a file to download. Open the file with winrar, put your sd card in your computer and extract all the files onto your sd card.
When their done take the card out and put it in your wii. click the wii message center in the bottom right corner and search for the red letter with a bomb and click it.
When the program is done your wii will be hacked and you will have the option to install The Homebrew Channel and BootMii you should install both. Now you will be able to run homebrew applications and watch movies,listen to music,ect.