How to view all unnamed faces - Solved!!
As a possible workaround
Set up a smart album with person contains <letter>
- Create a smart album
- Create a rule for "Person" -> "does not include" -> "a"
- Repeat for each letter of the alphabet
- Create a rule for "person" -> "is" -> <blank>. By blank I mean you don’t write anything it will filter all of the photos without a face.
- (Optional)- Create a rule for "album" -> "is not" -> "screenshots".
There's a screenshot of my rule below.