I have a Cannon EOS digital camera which I normally hook into my 2011 MacBook Pro and it recognizes it immediately, opens Photos and asks if I want to download the pictures from the camera. I downloaded Sierra yesterday, and plugged the camera in today. It didn't even recognize that there was a camera attached through the USB. Does anyone know if this is a problem people as seeing with the new OS? My guess is that since Apple is trying to ween us all off of ports to plug things in and physical disks that it may be by design. I can't afford another $1000.00 camera with bluetooth. Help!