So Ill start off with the info: 18,000+ pictures, photos app on MacOS High Sierra with the setting to download the originals to my Mac (and not optimize to save space). Now Im trying to do the face naming feature. Ill go and set either myself, my brother, and my sister in creating a new face from a photo, then going to the face to confirm additional faces. However after any change I make, I get the message of "Updating People... People will finish updating when Photos is in the background". So I close photos and let it do its thing. After an hour, it merged us all under one person. I go through to start the "this is not (persons name)" but we are talking thousands of pictures. So I simply remove the person to try again. But every time it is the same issue. How can I fix this to where photos isn't automatically overriding the people I assign? This is pretty frustrating especially since whenever I close it, it chooses to wipe all my work and override it with the incorrect information.