When I launch Touchdesigner version 2020 on my Macbook Pro 16" while my laptop is paired via Airplay: Sidecar as a secondary display to my Ipad Pro 2019 I get a red screen of the Touchdesigner UI. It only shows the UI functions and the red screen goes away when I drag the interphase window to my Ipad Pro (which is being used as a secondary display). When I drag the Touchdesigner window back to my laptop monitor it goes back to the bright red display.
Now if I have the Ipad as a secondary monitor disconnected via airplay: Sidecar feature on Mac OS quit and relaunch Touchdesigner, it launches normal with no red screen and I am able to function through the UI on my main laptop monitor. I can also continue to see all the user interphase without any red screen after launching the software then connecting my Ipad via sidecar feature and dragging the Touchdesigner window(s) back and forth between monitors.
I have a feeling this is due to the software not being sure which processor to run the application when the main computing processor is the laptop but the external display has it’s own processor as well and therefore I get this red screen on my laptop while everything works on the ipad pro display.
I thought I report this hardware bug, hopefully it was helpful.