The OpenCL code works on mac too, but it's not available in th e GUI due to a corner width/height case in which the downscale quality gets hideous. HandBrake ha

The OpenCL code works on mac too, but it's not available in th e GUI due to a corner width/height case in which the downscale quality gets hideous. HandBrake has got no active developer working on the OpenCL code anymore, so it will stay as it is until someone comes and fixes it.