photo won't sync

Thanks for posting in the Apple Support Communities sue_tony,

If you're photos are syncing, the following steps may provide a solution:

Check the status of your library in Photos

If your photos aren't syncing, check the status bar in the Photos app for a status message, then follow the onscreen directions or learn what your status message means. 

On your Mac

1. Open the Photos app.

2. Select Library in the Photos sidebar.

3. Click All Photos in the toolbar at the top of the window, then scroll to the bottom.

Reference the following page for more information about what the status message you're seeing means, and how to resolve it: If your iCloud Photos aren't syncing to your device

We hope this helps!