There is also a new xprotect and gatekeeper:
http://swcdn.apple.com/content/down...gwwexg1eqkk3d3iuv/XProtectPlistConfigData.pkg
http://swcdn.apple.com/content/down...k5ifv03n7qxcsumidx9i/GatekeeperConfigData.pkg
These often install automatically without any users interaction via the mac app store. However it is also quite common for them to fail to install. This results in many people having very old versions of these leaving their computers vulnerable. So it is good to get these installers to force them to install if necessary.
I find that the app Walls of Troy helps to ascertain if it is up-to-date. You can get it here if you want: https://itunes.apple.com/app/wallsoftroy/id443987849
@tywebb13
Are this downloads only for macOS High Sierra?