title: The requested version of macOS is not available. HOW TO FIX IT TUTORIAL. macOS Catalina public beta
body: <p>I'm unable to install catalina even after enrolling to the beta. it shows you mac is already uptodate.</p>
  
  <p><a href="https://i.stack.imgur.com/xZVNB.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xZVNB.png" alt="enter image description here"></a></p>