Hi - I am stuck a little here. When I import RAW files from Photos with the Apple RAW engine switched on in Assistant the first image usually goes in OK but then subsequent images fail - either black screen or a multi pane effect with parts of the image in each. Switching to Serif engine fixes this but the images appear underexposed and flat. Images are taken on an EOS 80D in manual mode. Any suggestions of workarounds or fixes please?