I've recently been building a large photo library, and, now that almost all of the content is in, I would like to start completing the people album. Photos says that it will "continue to scan your remaining photos when you're not using the app and your Mac is connected to power", so what I've been doing is letting the app run in the background (opening it and the focusing to another Window), telling my Mac never to sleep, plugging it in and leaving it on overnight. This, however, does not seem to be working; indeed, the number of faces scanned seems to be going DOWN (yesterday 57,807 photos had been scanned and now it's just 57,381). I seem to be meeting perfect conditions and yet nothing's happening. I should perhaps mention, however, that I've been getting it a little off each time, but not in a way that should affect it, I hope.

  • The first two nights I quit photos
  • The third night I left Photos focused.
  • And tonight I left Mission Control focused

The third night I left Photos focused and tonight I left Mission Control running.

What is causing this problem, and what am I doing wrong? If it helps, here are my system specs: My System Specs: mojave

  • You can add a face and the name of the person by opening the photo and tapping info button "i" . That way MAYBE the algo would add at least that person faster than others. Also later it will ask you to confirm other photos of the same person. – ankii Apr 28 '19 at 18:13

Apparently because the library is on an external drive there's a bug that's causing this to happen. I'll keep everyone posted for when there is a fix!

  • Any update? Where did you learn about this? – G-Wiz Oct 12 '19 at 15:33
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    I'm not sure. I reported it on the apple bug tracker and I think they've added it to their list but I don't know for certain – John Oct 14 '19 at 7:35

Firstly, you should completely Quit photos. The scanning service will run in the background even if the app is closed.

Secondly, when you go to the People tab, is there a button to see the (incomplete) People album? This might give you better insight into its progress.

  • I can go into the album but there are over 30,000 photos that haven't been scanned so I don't think it would help – John Apr 28 '19 at 18:36
  • @John 30k photos is a lot, you'll just have to be patient if it's making progress. Are your photos set to "optimize?" If so, consider it would have to download the original before scanning in that case. – Ezekiel Elin Apr 28 '19 at 19:57
  • I don't have iCloud Photo Library enabled. I understand that 30K is a lot but I can go into Photos and check how many have been scanned and I know it's not making any progress. – John Apr 29 '19 at 7:19

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