title: What is the system tray icon size for retina display?
body: <p>I've created a Qt5 app using PyQt5, now I am adapting images to be compatible with Retina Display on OS X. I've creating duplicates of them with the @2x modificator, but the fact is that I've not been able to make the tray icon to look correctly, I think it is because I am using the image in the wrong size.
  Does anybody have any idea? </p>
  
  <p><img src="https://i.stack.imgur.com/HYod6.png" alt="Blurry icon"></p>