Parsec supports several rendering options for client devices. We default to the newer rendering libraries, but this may cause issues with older hardware. On macOS, we default to Metal, but if you're experiencing issues on older hardware, we recommend testing OpenGL. On Windows, we default to DirectX 11 if your hardware supports it. Parsec can also work with DirectX 9 and OpenGL on Windows. For older hardware of if you're noticing a slight stutter in the video, you may want to try DirectX 9. Linux, Raspberry Pi, and Android only have one option for rendering at this time.