title: "restricted" folder/files in OS X El Capitan
body: <p>After upgrading from OS X Yosemite to OS X El Capitan Developer Preview, I tried to edit  <strong>/System/Library/LaunchDaemons/ssh.plist</strong> to change the default SSH port to a custom one. This is the process I've been using for a couple of years.</p>
  
  <p>The problem is that El Capitan doesn't allow me to change anything in this folder (not even with "sudo"). The folder and its files are marked as <strong>"restricted"</strong> when I list the contents with <strong>"ls -lO"</strong>. The same folder listing in previous versions of OS X does not show "restricted".</p>
  
  <p>Is this something new to OS X El Capitan? How can I edit files/folders that are <strong>"restricted"</strong>?</p>
  
  <hr>
  
  <p>I found out this is due to a new feature introduced in <strong>El Capitan</strong> called <strong>"SIP" (System Intregrity Protection)</strong>.</p>
  
  <p>Read more here: <a href="https://forums.developer.apple.com/thread/4731?q=SIP">https://forums.developer.apple.com/thread/4731?q=SIP</a></p>
  
  <p>Unfortunately, no one suggested a way of editing "restricted" files/folders without actually disabling SIP.</p>