Old photo library
On my macOS Catalina I have 3 photo libraries in my pictures folder. Photos Library is the one being used (115GB). I also have iPhoto.migratedphotolibrary (96GB) and an older iPhoto Library (different photos from the primary library 3GBs). I want access to all of these photos and to migrate to a new Mac or iCloud.
Are the iPhoto.migratedphotolibrary duplicates of the Photos from when Apple got rid of IPhoto?
How do I get old iPhoto library into my new library? Will they just automatically switch formats?
Thanks
MacBook Pro 13″, macOS 10.14