I also have Directx 8.1 installed. (I am running in Direct3D)<BR><BR>Is there any way I can run it in OpenGL mode - because I think my video card doesn't like Direct 3D.

As with previous point releases, any graphics card capable of running OpenGL 4 and 4.1 will be able to run applications that use 4.2.

Deprecation of OpenGL and OpenCL Apps built using OpenGL and OpenCL will continue to run in macOS 10.14, but these legacy technologies are deprecated in macOS 10.14.