Photos "uploading..." is stuck.
Installed Catalina, and now the Photos app is stuck on "Uploading 21,059 items"
In particular, it's not syncing the last couple weeks worth of new photos.
What is it doing? This "uploading" thing seems to be some sort of background process, but where are my most recent photos? Do I have to wait for it to do all this backlogging, which is taking forever, before it's going to simply show me my new photos? The new photos are available on my iPad and iPhone, just won't sync to iMac with Catalina.
iMac Pro, macOS 10.15