Brand New iMac Pro running the very latest MacOS Catalina 10.15.1. Running Virtualbox 6.0.14 (latest). Using Whonix-XFCE-188.8.131.52.3 image.
In any other display resolution except the default micro sized one loaded at import the workstation and gateway GUI become unusable. Choppy, slow - mouse clicks can take 15-30 seconds to register (if they do).
I followed the instructions "5. VirtualBox Screen Resolution Bug " on this webpage (/wiki/MacOS) but this does not fix the problem.
Any advice how to troubleshoot this?