I am having a problem with jittery graphics on MacBook Pro running Catalina 10.15.7. It does no matter whether native resolution fullscreen or in a window. I have made a recording, but am unable to attach the file either as .anim or compressed into zip. Can I email it to you?
I just watched your flight recording (test1.anim) on my MacBook Pro (also Catalina 10.15.7). Everything runs smoothly ... even in Retina mode.
Mac's GPU rendering performance is not the best. So I recommend reducing the size of the simulator window or turning off Retina mode. Look for the simulator's program icon and press cmd + i. Then check the "Open in lower resolution" option and try again.