Photo's when enlarged become an exclamation mark in a triangle
Hi, I've been taking photos with my Nikon D5600 and shooting in RAW. When i go to import them into 'Photos' on my MacBook Air, the photos import fine. The thumbnail of each photo looks how it should, its when you go to open the photo or enlarge it, that the image then become an exclamation mark. If someone could help. It would be greatly appreciated.
PS. I have tried restoring 'Photos' with 'command + Option'. No luck.
MacBook Air, iOS 10.3.3, Operating System is 10.11.6.