I just upgraded to a 2012 MBP retina running 10.9.5. It will not connect and download from either my Nikon Coolpix or my new Nikon D810 while connected by cable through the USB port. I have tried connecting with Image Capture, iPhoto and Nikon View NX2---none of them see the camera. My only workaround is to remove the cards and read them with either the built in SD reader or a USB reader. What's frustrating is that my ancient MBP running Snow Leopard connects just fine with either camera and iPhoto. Has anyone had experience with this problem? Thanks, Brad, Mac user since 1987