How do I turn off the rootless in OS X El Capitan 10.11?

(As you will be restarting your OS X device. It might be helpful to print these instructions or access them from a different device).

To disable the rootless feature, reboot your OS into Recovery Mode, to do this:

• Restart your Mac, and as soon as the screen turns black hold down ⌘R until the Apple logo appears on your screen.
  
  
  
   
• You have successfully entered Recovery Mode if you see this:
  
  
• Now click on the "Utilities" menu, and then "Terminal".
  
  
  
  
  
• In the Terminal Window type:
  
  csrutil disable
  
  Press return, you should then see the following message
  
  
  
  
  
• Restart OS X, your Mac should then restart as normal with SIP disabled,
  

To re-enable System Integrity Protection, do this:

• Restart OS X again and hold down ⌘R as earlier, until you see the Apple Logo
• Now click on Utilities", then "Terminal".
• In the Terminal Window type:
  
  csrutil enable
  
  Then press the return key, you should then see the following message
  
  
  
  
  
• Restart OS X, Your Mac should then restart as normal.
• Done!

reference : https://www.quora.com/How-do-I-turn-off-the-rootless-in-OS-X-El-Capitan-10-11