I got new imac and migrated old macbook to new computer with time machine backup. Worked Great. New imac "looks" just like old macbook, I guess with same iTune 10 settings. I tried to syn iphone 4 (running iOS 4.0), but it would not syn with iTunes. Interestingly, the iphone did automatically syn with iphoto, but not iTunes. I have not tried to syn ipad to new imac yet.