I had the same problem. As soon as I updated the software and restarted my Mac, it automatically reopened the Photos App and started importing the photos as it had always done before!
martatova
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution