Reply To: Syphon Virtual Screen (again!) Home › Forums › Syphon › Syphon Implementations – User › Syphon Virtual Screen (again!) › Reply To: Syphon Virtual Screen (again!) July 22, 2012 at 6:25 pm #6200 vadeKeymaster Cool. My thought process was that potentially, the window server manages uploading that software screen to an offline GPU, thus the IOSurface backing would be on the GPU, not CPU. Worth trying… This reply was modified 8 years, 4 months ago by vade.