When you have Final Cut and Logic Studio you have some of the App the same, both of it are upgrade version, in my iMac 24 now i have in my Library loops 2 or 3 times the same , some series of loop show in red, so when my MacPro coming in how to avoid this problem when i install. Try to see in Apple forum humm wont work + what is a - XSkey-, and how to find it
Thank you