title: Pygame window not receiving keyboard events on Mac
body: <p>I am running this very simple tutorial on Pygame:</p>
  
  <p><a href="https://www.youtube.com/watch?v=xh4SV3kF-zk" rel="nofollow noreferrer">https://www.youtube.com/watch?v=xh4SV3kF-zk</a></p>
  
  <p>I can't get keyboard events to be recognised by the game window. I have read a number of similar questions about this, but the answers don't seem right for Macs.</p>
  
  <p>I am using miniconda and it might be that I need to quit the virtualenvironment? I don't understand how to do that tho. Or maybe I need to set the focus to my window - but I don't know how to do that either. This must be an issue lots of people are having on Macs running El Capitan. My Mac is too old to upgrade properly to Sierra. Is there a way to get the keyboard input to work?</p>
  
  <pre><code>import pygame
  
  pygame.init()
  
  display_width = 1200
  display_height = 800
  
  black = (0, 0, 0)
  white = (255, 255, 255)
  red = (255, 0, 0)
  green = (0, 255, 0)
  blue = (0, 0, 255)
  
  
  gameDisplay = pygame.display.set_mode((display_width, display_height))
  pygame.display.set_caption('A Bit Racey')
  clock = pygame.time.Clock()
  
  speederImg = pygame.image.load('speeder.png')
  
  def speeder(x, y):
      gameDisplay.blit(speederImg, (x, y))
  
  x = (display_width * 0.4)
  y = (display_height * 0.2)
  
  x_change = 0
  
  crashed = False
  
  while not crashed:
  
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              crashed = True
  
          if event.type == pygame.KEYDOWN:
              if event.key == pygame.K_LEFT:
                  x_change = -5
              elif event.key == pygame.K_RIGHT:
                  x_change = 5
  
          if event.type == pygame.KEYUP:
              if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                  x_change = 0
  
      x += x_change
  
      gameDisplay.fill(white)
      speeder(x, y)
          # print(event)
  
  
      pygame.display.update()
  
      clock.tick(60)
  
  pygame.quit()
  quit()
  </code></pre>