Apple Photos is stuck forever in face recognition and photo curation.
How can I get it working again?
I) Photo Library Charateristics
I mentioned that I had one main system photo library (being mostly local only, iCloud only for few shared albums) and a private library. And described there characteristics in great detail, to find possible causes. Did all not matter!
II) Main fix strategies found online 2020-2021:
As links here, in detail as individual answers below:
- Working solution eventually! 🙂