Thanks again. According to the article, it is a known limitation, that:
- The GPU and emulation only support DirectX11. DirectX12 features will not be available on this environment, and will fall back to DirectX11. If you choose OpenGL, you will receive an error stating no compatible graphics adapter was found, and rendering will fall back to CPU emulation.
It is the last sentence that appears to apply to my situation. According to this Parallels article, "Parallels uses OpenGL to implement 3D acceleration."
Again, I currently have Parallels Version 1.9.2 (23872) running on a virtualized Windows 11 machine.
I may need to find a way to elect to use DirectX instead of OpenGL if possible to avoid having my ArcGIS Pro fall back its rendering to the CPU.