@knight556 - It’s an interesting problem, thank you for bringing it to our attention .
Thanks to @mhorga, I’ve been able to reproduce the problem on my MacBook Pro, by running on my Intel GPU, rather than my AMD one. Your MacBook only has the integrated Intel GPU, I believe.
I’ve been testing on the Chapter 9 Scene Graph scene, and it appears to be only the ground plane that’s causing the problem. I don’t know why, for the moment, but it works when I replace the ground plane with a large flattened box.
I’ll attach that here, so that you can use it in place of the ground plane, and we’ll continue to examine the problem and see why.
boxground.zip (1.4 KB)