Firstly, please don't tell me to get PC, because it's proven a Mac can do far more than a PC can when it comes to external displays.So, I got a display for Christmas to plug into my laptop. I go along and turn on display mirroring on my laptop and close the screen. The display and everything works until I modify the size of the Minecraft window. Every time I've resized it, it's crashed my laptop. Works fine when it's open, but not when it's closed. Is this just some sort of Java or Minecraft issue, and does anyone know how I could fix it?Thanks.