Smart Album to show pics with no faces, & any photos that iPhoto no faceID

If I understand you correctly, I don't think you can do this.

but also to have photos which iPhoto has not picked up that a photo needs a "face ID" on

How can iPhoto find photos that have faces in it +that it didn't recognise as faces+ ? "Please show me all the photos that you think don't have faces but actually do"?

Please correct me if I've misunderstood.

Regards

TD

A smart album with the criteria "Face is unnamed" will find any photo with an unnamed face on it. It can be either one with a named face or two but at least one unnamed face or a photo with no faces named.

There is workaround to get what you want.

1 - add a keyword, face, to any photo you name a face in.
2 - create a smart album with the criteria "Keyword is not face".

This will identify any photo with no face at all. If you've not added any other keywords to photos you can create the smart album above and then sort by keyword. Those with both a face and unnamed face will have the keyword face and can be sorted to the top or bottom of the list.

Go to the Faces mode and select all the face icons. Then click on the Smart album button. Go to the new smart album, select all and bring up the keyword pane, Command+K, apply the keyword or create one and then apply.