So in Googling, here's what I know. I simply need to deauthorize the old PC, and authorize my new Mac to transfer songs purchased from iTunes from my iPhone to my new Mac. That's correct right? To get songs not purchased from iTunes from my old PC to my Mac, I need to send those to a portable hard drive, then transfer that from the hard drive to my new Mac. Correct? Then there's the iPhone back up. I'm not sure how this works, cause I can sync contacts, calendar, safari bookmarks, and notes to iTunes., and while I'm syncing those, the back up process is taking forever (it's actually backing up my entire iPhone, despite my not having that iTunes connected to the net? If that were the case, then I don't need to worry about transfering my iPhone back up from my old PC to my new Mac?). Help would be awesome!