My old MacBook Pro died and I had to buy a new one, a 2016 model. Now I know that Apple has end-of-lifed Aperture, but I'm still using Aperture 3. But when I imported the Aperture Library from the back up drive, the strangest thing happened. The size was reported as 179.95 GiB, which seemed excessive. And a few of the Projects which showed as, for example, 31 images turned out when opened to contain 14,449 images, mainly duplicates of the entire library in one project. Opening one of those projects and deleting a group of photos that are duplicates from another project results in the originals also being deleted.
In attempting to trouble shoot this issue I tried importing the Aperture Library with Photos, but that didn't work. So my question is: has anyone else had this problem, and are there any ideas on how to recover the photos in the Aperture Library without using Aperture or Photos?