I am trying to convert my newer MacBook Air to be my "media hub", from an older iMac. I already moved my entire iTunes library to an external drive. When connected to my iMac, which was the Mac I used to purchase content originally on my previous Apple ID, thus has all my permissions to play everything I have on iTunes, everything runs. However, that iMac is getting very old, and I need to run my library from a newer machine that is running better. I have a newer MacBook Air that I wish to use as the replacement. However, it does not have those old permission. The problem I think I have is that I cannot log into my old Apple ID because 1) the email account associated with it no longer exists, and 2) my previous Apple ID technically no longer exists, as I simply changed it to the one I have now -- I didn't create a new one. So when I try to log in using my old Apple ID and password, I get the error message "Apple ID does not exist". I am assuming the permission data is stored somewhere on my iMac, but I don't know where or what it looks like. Is it possible to find that data, and move it over to my MacBook? Will it work that way? I have hundreds of dollars worth of media I purchased with my old ID, but my iMac is slowly withering away. I need to be able to operate my library from another machine. Can some one give me instructions on how to get my MacBook to run all of my content?