So, today, I updated my old 2011 mac to the one I'm typing on now. I decided to make a new Apple ID and use that for a new iTunes. I decided that all I had to do to transfer my music from my old iTunes to the new one was plug and sync my iPhone which has the old ID and iTunes. I did that and all that happened was I put my photos in iPhotos and when I tried going to my music, what happened was only about 4 albums, which I purchased all myself. I say that because I used to use my PC with my brothers' iTunes to just sync music to my phone. Anyway, there are a few songs and albums that for some reason aren't showing up in the song list that I use to transfer, why might that be and how do I transfer the remaining songs?