photos not syncing
I've been using iCloud Photo Library for quite some time and have had no issues, but for whatever reason, iCloud photos taken on my iPhone are suddenly not downloading to my Mac. I have made no changes to any settings on any device - and I have "download originals to this Mac" checked - but Photos has been stuck on "Downloading 289 Originals" for at least a week. I've tried rebooting, killing the Photos processes using Activity Monitor, etc., but nothing has helped.
I've considered signing in and out of iCloud, but want to avoid the whole re-syncing process that can take days.
Any ideas?
Mac mini, iOS 11.2.6, 2014 i5 1TB