title: Enabling GPU Frame Capture
body: <p>I am trying to build a Metal compute application. I wrote my first kernel, and now I want to see it's output from the compute shader. But, the "GPU Frame Capture" options are disabled in XCode.
  I'm using XCode 9.2. I have already enabled GPU Frame Capture in the schemes, that I'm running.
  Any hint about, why this might be happening?</p>