Moving my iPhone to a new Macbook
I don’t know if I got lucky, but I was just able to sync my iPhone with my new Macbook Pro with no warnings whatsoever about transferring purchases or making a copy of the iPhone’s backup directory and doing a full restore. iTunes simply copied a couple of new apps I had purchased on the iPhone over to my Macbook and it said “Sync Complete.” That’s it!
I have had a couple different iPods in the past and each time I moved one to a new computer I had to wipe it out and start over. I was expecting/dreading to do the same here. The only thing I did which I hadn’t done in the past was to copy the entire ~/Music/iTunes
directory from my old Macbook to the new one before connecting the iPhone. Starting up iTunes after that showed all my original playlists just as they were on the old notebook. I plugged in the iPhone and only received one notice asking if I wanted to share diagnostic information with Apple (I said yes). So this was definitely the first time this copy of iTunes had seen this iPhone, but everything worked out okay.