I've been trying to identify people in my Photo's collections on my respective devices (iMac, iPhone, iPad - all on latest OS) but the results don't seem to sync between devices. This did work for me way back when ID-ing was manual, but with the new AI driven People folder it doesn't seem too. I don't use iCloud Photos or even Photo Stream but I do regularly backup/sync my iPad/iPhone to my iMac with sync all photos enabled. Do I have to have cloud services turned on for this to work? Any other suggestions to try?