title: How to browse for folder on Windows AND OSX?
body: <p>Usually, I use <code>SHBrowseForFolder</code> to support browsing for a folder... but I want to support both Windows and OSX.</p>
  
  <p>I looked at:</p>
  
  <ul>
  <li><code>System.IOUtils</code> but didn't find any relevant function (maybe, I missed
  one?)</li>
  <li><code>TOpenDialog</code> options but didn't find one to pick a folder instead of a file...</li>
  </ul>
  
  <p>Any idea?
  (I can manage <code>ifdef</code> for Windows but I have no clue for the Mac part...)</p>
  
  <p>Cheers,</p>
  
  <p>W.</p>