So I got the iMac and its now my main computer. For now my mac mini will serve as a media center for when I am on my cycle trainer it may later be replaced by an appleTV. The actual data is stored on an external drive plugged into the iMac now, but I haven't used iTunes yet. My apple ID is the same on both computers. What I want to do have all the library data: track ratings, album art, number of plays, playlists etc from the mini moved to the iMac and be able to sync my ipod to the iMac. Then I want to share the library with the Mini. I don't want any other data anywhere synced or otherwise changed. SOLUTION Just did this. The goal: Leave files in tact on external drive but move library information (ratings, play count, etc.) to my new imac from my mini. Both computers running Snow Leopard and iTunes 9. Move from Mac Mini to iMac Step 1: Network the computers Make sure iTunes is closed on both computers Step 2: Copy iTunes folder (UserHomeFolder/Music/iTunes/) from Mini to the same location on the iMac Step 3: Open iTunes on the iMac to ensure proper move of library info Step 4: On the iMac iTunes>Preferences>Sharing, check "Share my library on my local network" Step 5: Delete iTunes folder on Mini (You don't have to do this, I'd just rather use the Mini strictly as a drone to the iMac) Step 6: Open iTunes on Mini, the iMac library is fully listed and usable. Obviously you would need a few extra steps if you were moving the actual files.