Hey there, I submitted a support ticket, but wanted to post my topic here also to see if other Mac users have this issue.
Mac sierra / v11 public beta as of todays version/ sky max pro 4.0.1
the images are the same, except for the top one has cloud shadows enabled, while the second does not. enabling seems to cause directly or indirectly graphical distortion- this is the erj 140 payware plane from x-plane.org store. I have not seen this on other planes yet that still persist, the challenger 300 had this too but by removing the materials ng folder, the issue was solved for the 300. The erj does not have such folder, and i did some more testing, thus my result is shadows on= bad off= good
Log.txt