iCloud Photos not syncing back to iMac
It looks like in June photos stopped syncing from iCloud back to my iMac. Previously I was configured so that my iMac received all photos in iCloud but did not send photos to iCloud, only my IOS devices send photos to iCloud (I do not want so send my iMac photos to the cloud). What configuration got changed? Only the iCloud Photo Sharing box is checked in Photo iCloud Prefs. I am running the latest OS on all devices. I have about 35,000 photos so size should not be an issue. Thanks for the help.
iMac with Retina 5K display, macOS High Sierra (10.13.6)