title: How to install Gnat Programming Studio (GPS) on Mac?
body: <p>I managed to install the gnat compiler from libre.adacore.com on a OSx 10.6.8. I would like to install also the Gnat Programming Studio (GPS) environment. I tried different things but none of them worked and I found no exhaustive explanation.</p>
  
  <p>Could someone explain (possibly step by step) how to perform the installation of GPS on a OSX operating system?
  Thanks</p>