Develop Module unresponsive
Help! I finally updated MacBook Pro to OS Sierra, and since then, Lightroom CC has been freezing in the Develop module. It doesn't completely freeze up, but my preview image won't change, no matter where I click on the bottom filmstrip. It will still change images in the Navigator window (and I can still select images in the filmstrip to delete (or add to a quick collection, etc), but I cannot edit. I CAN, however, batch sync images in the Library Module.
All is fixed when I quit LR and reopen it, but locks again soon. From what I can tell, it locks when I "Delete Rejected Photos" from the Photo menu, but sometimes it seems to happen randomly.