Cannot change permissions on /System/Library I am running OS X 10.11.8. I am attempting to change some settings in /Library/Filters/. I am logged in as an administrator (verified in System Preferences > Users &amp; Groups). When I go to Finder > Get Info for /System/Library/, I am able to click the unlock icon, and my password is accepted.

However, when I try to change the permission for "everyone," I get the following error:


  The operation can’t be completed because you don’t have the necessary permission.




How can I resolve this?
You'll need to disable System Integrity Protection to make changes to permissions in /System.


  To disable System Integrity Protection, you can do the following:
  
  
  Boot into the Recovery HD by restarting whilst holding ⌘R.
  Open Terminal (from the Utilities menu).
  Run the following command in Terminal:

csrutil disable

  Restart.
  


Disable OS X El Capitan Rootless and permit write actions to System Integrity Protection locations