Well my ipod touch is about 2 years old and it has synced just fine with my other computers. This past December I bought a new macbook pro 15 and authorized itunes to my ipod like I'm supposed to, but it doesn't like to sync for some reason. Just recently I finally got them to sync and I bought some songs in itunes, but it won't transfer onto my ipod, but my apps transfer. If I go into my device info in itunes it gives the option to sync all music, but if I do that I will loose all the music that I don't have on the computer and I don't want that to happen.