I was hoping to get DirectX11 support when running AutoCAD in Parallels 15 (Windows 10 pro 1809 as guest and Catalina 10.15 as host), but it looks like it doesn't work yet. The option to turn on hardware acceleration in AutoCAD (i.e. select DirectX 11) is grayed out. I have tried using the gaming mode in Parallels and tweaking graphics settings, but I just can't get AutoCAD to use DirectX 11.