The picture I tested is viewable in its Album folder and I know it was synced (it appears on other devices already) so why won't it show in the Test folder?
But did you try to edit it? Only then you can be sure that it can be processed and the original image file can be accessed by Photos.
iCloud syncing is uploading the photos as they are, but "Shared Albums" are sending smaller versions in a reduced size, so Photos needs to be able to edit the Shared Photos.
If the photos do not appear in the Shared album, even if they can be edited, try to reset iCloud Photo Sharing.
Quit Photos and sign out of iCloud Photo Sharing in the System Preferences > iCloud > Photos
Then restart the Mac and enable Photos Sharing again.
If the albums will still not sync, try the fix in this post: Re: Yosemite Photos iCloud photo sharing not working
LaCollisionMay 1, 2015 6:21 PM
Re: Yosemite Photos iCloud photo sharing not workingin response to pendlebumHelpful
VERY interesting, thank you!!
I had the same problem after a Time Machine backup.
I've found a solution :
1. Quit Photos
2. Remove the folder:
~/Library/Containers/com.apple.cloudphotosd/Data/Library/Application Support/com.apple.cloudphotosd
3. Restart
4. Launch Photos
… and everything works again!!
Your user library may still be hidden.
To reveal the hidden User Library:
- Bring the Finder forward by clicking on the Desktop or the Finder icon in the Dock.
- Select your user/home folder (with the house icon in the Finder sidebar)
- With that Finder window as the front window, press the key combination ⌘J to bring up the View options.
- In the View options panel enable ’Show Library Folder’. That will make your user library folder visible in your Home folder.
- Open your Home folder, then the Library folder, then Containers.
- Move the complete folder ~/Library/Containers/com.apple.cloudphotosd/Data/Library/Application Support/com.apple.cloudphotosd to your desktop. Move the entire folder, not just the contents.
Now restart the Mac and try again. If all is well, delete the folder from the Desktop.