I updated last week to 10.12.6 from Yosemite. I’m noticing a few strange things and I don’t know if that’s why. I just imported a photo into Photos. I always used this for quick editing: cropping mainly. This time, first time I’ve opened it in Sierra, it behaves as expected until I hit done. Then two things happened. First the crop was all cockeyed. It jumps way up in the upper right hand corner and only shows the lower left portion of the photo. Then when I choose export it’s pixelated. WTF is happening? I had to use Affinity Photo.