Hi,
This has happened to me for the third time now!
Rhino crashes my entire system, when I leave Raytraced view (Cycles) running for a couple of minutes. It never seems to converge - arrive at stage that it deems satisfactory -, and thus a system dialogue pops up after a certain time that tells me that Rhino intends to use 87GB of memory. I only have 16GB.
Consequently, macOS freezes completely and I have to reboot manually by pressing the on/off button. No Rhino crash report gets generated!
I’ve Rhino 7 (7.9.21222.15002, 2021-08-10) and I’m running it on macOS 11.5.2 (Big Sur).