Things You'll Need
Instructions
Setting up the Xbox
Download Connect 360 and drag it to the Apps folder.
Go to the systems tab on the Xbox then "Network Settings."
Press the test media connection.
Setting up the Mac
Open the Connect 360 preference pane, which can be found in system preferences.
Click the start button to enable media sharing with the Xbox.
Add iTunes playlists, movies, and pictures to shared media in Connect 360.