How can I restore missing Faces tiles in Photos app?

two suggestions

1 - get rid of CleanMyMac - it is Malwear and you should never use it (or any other cleaning software) - it is never needed and is very dangerous as it has been known to totally disable computers by removing needed system files - CleanMyMac and MacKeeper are two of the very worst programs around

2 - restore your backup from before you ran CleanMyMac and destroyed your Photos library

LN

There is no way to restore the faces by repairing the library.

The faces thumbnails will only be created, when you import photos. You cannot force Photos to repeat this step. Only reimporting the photo will help.

But the missing faces are only one symptom of the real damage CleanMyMac has done. It deleted the original versions of your photos and replaced them by the edited versions, Your photos lost quality, you can no longer revert to the original version of a photo, and if you had several edited versions of the same photo, they will be incorrectly linked. Your projects - books, calendars may now have missing photos. Don't even try to repair this damage. It cannot be done, because important files have been lost. Restore from your backup as Larry advised.

There are no useless copies in your Photos Library as CleanMyMac is suggesting. CleanMyMac is destroying your precious originals and only keeping the smaller, less quality edited versions creating for sharing. http://macpaw.com/cleanmymac

It’s not your photos that are wasting space, it’s the hidden copies in your Photos library. You see, anytime you edit or rotate a photo, Photos creates a duplicate of the original and hide it for safe keeping. This means gigabytes of useless copies. CleanMyMac 3 cleans out all of them without harming any of your photos.

You should export any newer photos before restoring - but as to CMM it is really bad and should never be used if you care about your photos and your computer -

LN

You're welcome 🙂