I am working on a Macbook and I have a question. It was originally on OS X 10.6. I made an image using Super Duper. Then I upgraded all the way to 10.12 and then formatted the disk and did a fresh install. I want to move the iPhotos library to the new disk. I opened the backup drive and found the iPhoto library. I opened it and it went through some process. Now when I try to open it, it says "Cannot open migrated library". So I am assuming it migrated it to the new Photos app. But if I click open I just get the photos on the main drive. How can I move the pictures off the backup drive to the new drive?