I recently purchased a Nikon D 800 camera. My first full frame camera. However when I tried to download some RAW test shots from the camera, They appear in Iphoto 11. HOwever when I download them I end up with a message saying that the files are unreadable. I've checked the Iphoto preferences and they seem fine. BTW my computer is a fairly new Mac Pro. The pics do down load in NX View which came with the camera. However I like to work in Iphoto as I usually do a minimum of post processing. Any suggestions.