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→Emulation issues
Hypervisors don't have direct access to the graphics hardware with few exceptions including Virgil/Virtio GPU available in QEMU (only works with Linux guests) and VMWare ESXi GPU passthrough, which means graphics card emulation is less than ideal for video games that use 3D APIs. However, 3D acceleration in hypervisors today is capable of running fairly demanding video games or other 3D applications with a few drawbacks such as limited DirectX API versions. Every hypervisor has a different approach to handling 3D graphics, and most of the time companion programs such as VMware Tools have to be installed in virtualized operating systems. Supports for OpenGL are slightly better than Direct3D since it doesn't have to be reverse engineered, but most Windows games (including ports) use Direct3D.
===[[Macintosh line#x86|macOS]]===
There's an ongoing effort to get macOS installations working on hypervisors that run on non-Apple hardware. Such support has historically been low or non-existent since Apple makes no effort to support standard PC hardware. Some people have gotten this to successfully work on KVM/QEMU, with an example/setup guide for Debian/Ubuntu hosts being available [https://github.com/kholia/OSX-KVM here].