Painter 2021 not recognizing Mac 10.15.7 (Catalina) GPU

Hello! My mac updated today, unfortunately to Mac OS 10.15.7 (Catalina) and when I went to restart Painter 2021 and check my preferences, the GPU section to accelerate performance was greyed out. You have to understand I have an external GPU to handle these heavy programs. I had Painter re-run the Brush Accelerator test and went from a 3000+ to a 1200 since the time of the update. Nothing else on my machine has changed. I'm not new to Painter by any means. 

Any thoughts? I absolutely need Painter to use the external GPU!

Help!
Thank you, Heather