title: How can I make another button highlighten on popup window on Mac by using Keyboard
body: <p><img src="https://i.stack.imgur.com/UEEdq.png" alt="enter image description here"></p>
  
  <p>On the above shown asking popup window on Mac, how can I select another button (left button) by using keyboard.
  Without clicking mouse button, I want to make left button highlighten.
  Is there any shortcuts? </p>