I used PM6 for the first time in anger on Monday at a football final. All was fine until I'd imported approx. 100-200 images. Clicking through the images I noticed they we all pixelated and they would not show as normal images would. I didn't have time to worry about it so closed PM6 and used PM5 for the rest of the match. This obviously is not great! I have tried with and without automatic graphics switching.
I have attached a screenshot showing the pixelated image and they are all the same. They are perfect in PM5.
I use a 2015 MBP 2.5Ghz i7 with 16GB RAM running Sierra 10.12.6. Photo Mechanic Version 6.0, build 3143 (3bc32e6)