Security & Privacy issue: cannot edit options I am trying to set password when active the screen saves. This option is in Security &amp; Privacy -> Require Password checkbox.

The problem is that this checkbox is gray - read only access - even if I unlock this in padlock. I am also using the administrator user.

How solve it? Is there any Terminal command to add the password?

I am using macOS Sierra 10.12.3.
Go to System Preferences > Security &amp; Privacy > General:

Select the option "Require password" and set "immediately" on the box with the options.