The Family setting is missing from my Preferences Pane in System Preferences. I have it on one macbook but not on the other. The two are configured nearly the same. How do I add it back or reset the preference pane so it shows up? I'd like to be able to get notifications when my daughter is trying to purchase and application or song. I get them when I'm on the one macbook, but not the other.
MacBook Pro with Retina display, OS X El Capitan (10.11)