You might consider giving this app a look. I am not familiar with its capabilities, but it is designed to manipulate the Photos .photolibrary bundles:
PowerPhotos - Merge Mac Photos libraries, find duplicate photos, and more
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On Jul 4, 2023, at 11:35 AM, Bob Gerard <rowerbob@...> wrote:
My aim is to be sure that ALL her photos will end up in Photos.app on her new MB Pro.
