Originally Posted By: artie505
Software Update prefs are found under System Prefs > App Store in Sierra, but I think they're still the same as in earlier OS versions.

Nope. In Lion it's as I stated. And the last Apple security update I received (after I initiated it) was in 2014.
I've never dealt with the App Store and don't even know how to get there (if I wanted to, which I don't).