I'm going to be selling this Mac on eBay, therefore I need to deauthorize the computer. <br><br>Question:<br><br>Over the 2 years I've been buying from iTunes, I've used around 4 accounts to purchase various songs. Do I need to deauthorize this computer from all 4 accounts? Anybody know if I have to do that through iTunes itself, or can it be done online?<br><br><br><br>