We have 2 MacBook Air's in the house a 13" and 11" the 11" is a recent edition as a Christmas gift for our little girl. Anyway they are both using the latest software and all update are up to date. The problem I'm having is when my little girl used my 13" she could use music out of the iTunes library on her iMovie projects, but with her 11" when she tries to do this the library music is swing all tracks are protected? I have looked and compared both machines side by side and I can't see any difference in any of the tick boxes in both programmes? The only difference between them is the 11" has Apple Music subscription and the 13" doesn't! I even bought a track thinking it might be a Apple Music sharing issue, but still saying the same thing? The only other thing I can think of is the 13" was bought from a UK store and the 11" was bought of Amazon and came with US keyboard options which at a touch of a button changed it to UK keyboard? I hope you understand my explanation and I hope someone can help me out?