[groovybits]

Awesome, thank you! Have you attempted transferring those backups from one computer to another? (i.e. upgrading from one Mac to the next)

[mttjj]

Yes in the sense that I plug in my external hard drive to the new computer and point the new computer's TV app library to the existing library on the external HD. Then it will prompt for authentication the first time I try to play something. After that the movies will play.