iTunes can't access Photos during sync

[ellis984]

I sync my iPhone 6s weekly. Starting last week, during the last step of the syncing process, my iMac tells me it cannot update my photo changes because "Photos is not yet available". I haven't a clue what to do about that. I run El Capitan.

 

[Cory Cooper]

Hello and welcome.

-Which model iMac?
-What iOS is the iPhone 6s running?
-If you launch Photos, are all of your photos/videos still there and viewable?

C