After installing RF9 on my Macbook Pro 16" (2019), it would not run on a Windows partition of my hard drive. I was on the phone with a competent woman at Horizon Hobby for three days, but nothing we tried worked.
Then I went over to KnifeEdge.com and found this post:
https://www.knifeedge.com/forums/in...oad-macbook-pro-2020-bootcamp-solution.52301/
I am now up and running.
If anyone else experiences the dreaded "black screen" issue on their Macbook Pro 16" (mine was a 2019 model), the link above will work, but you have to follow the instructions exactly or, like me, you will have to erase your Windows partition, re-create it, and then re-install Windows. And I can't remember where, but somewhere in the video he has you booting into SAFE mode, which i think it necessary, but then I had to reboot back into Normal mode a step before he did.