Have a Canon EOS 40D DSLR. It uses Compact Flash cards for storage, not SD cards. I have the camera connection kit. A few weeks ago I successfully transferred a number of RAW image files from the camera to the Photos app as a test. Then I installed the new iPhoto app. Since then I have been unable to copy photos from camera. I connect the camera, turn it on and the Photos app opens as it should. The Camera tab appears and images start to download. Then the Camera tab drops out and new images disappear. I tried uninstalling iPhoto's and then deleting all images from Photos and tried again. Same thing happens. Does anyone know what the problem might be?