title: How can I fix "Your requirements could not be resolved to an installable set of packages." in Laravel 5?
body: <p>I tried to install a fresh installation of Laravel 5 on my Mac.  I'm stuck already, and I just started. </p>
  
  <p>I run : <code>composer create-project laravel/laravel l5</code></p>
  
  <p>I got this error</p>
  
  <p><img src="https://i.stack.imgur.com/xP5YO.png" alt="enter image description here"></p>
  
  <p>This is what I have in <code>composer.json</code></p>
  
  <p><img src="https://i.stack.imgur.com/conJF.png" alt="enter image description here"></p>