iCloud Photos Library no longer synching to iMac but to everything else
All photos and videos in the Photos Library in iCloud are synching to my iPhone, iPad, Macbook Pro, and Air but not to my iMac (since last week). The photo count is 11,044 on the iMac, about 1,200 less than on the other devices and "Updating..." is displayed under the photo count numbers. There are also about 400 videos in the library, which is just under 100 GB in size.
It appears that some process is looping in the iMac Photo app - what can be done to refresh/reboot/reinstall it without affecting the content of the iCloud library? The iMac (late 2014) is running Big Sur 11.7.4 as are the Macbooks (mid 2013).
Earlier Mac models