Cannot Save Photoshop Edits Back to Lightroom

I just purchased a new Macbook and have installed Lightroom CC and Photoshop CC. When in Lightroom, I can choose to edit my photo in Photoshop. However, when I'm finished with my edits in Photoshop and press "Save" (not Save As), the TIFF options dialogue box pops up. I cannot get it to return the edited image back to Lightroom by simply selecting "Save" and closing the image. I've attempted to re-install both applications to no avail.

I've done this hundreds of times on my old Macbook with no issues, so I'm not sure what I'm missing here...

Steve