I instilled windows 10 on my mac and downloaded blender but blender still won't open it well pop up a message saying A graphics card and driver with support for OpenGL 3.3 or higher is required. Installing the latest driver for your graphics card may resolve this issue. How do I instill the latest diver for my graphics card? by the way I installed windows 10 on my iMac instead of upgrading my iMac just in case something bad happens like all of my other apps are not supported after the upgrade.
The VirtualBox's guest addition doesn't seem to support OpenGL 3.3. VMWare Workstation Player could work. However even when Blender is running in a VM it will have a significant downsides to the performance.