Are "Favorites" and edits synced with Photos for Mac/iOS? I'm using the latest version of Photos on both of my iMacs, my iPhone, and two iPads.

I'm also using iCloud for storage and syncing.

So far - everything seems to work - when I take a photo on my iPhone, it shows up on all my Macs and devices.

However - what happens when I edit a photo in Photos on one of my iMacs? Does the edited photo show up on my other Mac and other devices? Also - if I "favorite" a photo in Photos - should that show up on my other devices?
According to this Support article from 2016 the answer depends on how you sync:


If you import photos from an iOS device to Photos over USB, the favorite status will not sync (!)
If you use iCloud Photo Library to sync across devices the favorite status will sync. 


Source: Apple Support - Q: iOS Photos to OSX Photos favorites sync

FWIW this is totally offensive and horrible, I can hardly believe it. I just did an import of 3k images and apparently have lost all of my favorite statuses. What a mess.