Hello- I have an iPhone 4 which I have synced to a slow, older Macbook instead of my faster iMac because the iMac was running Tiger when I bought the iPhone. I have since upgraded the iMac to Snow Leopard and would like to use the iMac to manage my music and apps (I manage everything manually). Is there a way to switch over without having to start all over. I don't want to lose all my music, game scores, app settings, etc. Any help is greatly appreciated.