Re:About the security content of Security Update 2017-001
by GeekyBear on Wednesday November 29, 2017 @05:34PM
(#15811537)
Not regardless of settings, but critical security updates will be installed without user intervention with the default settings in the App Store Control Panel.
Here's an article discussing their first use of this mechanism.
https://www.computerworld.com/article/2862976/apple-deploys-...
(BTW the patch doesn't require restarting the machine, so it's not going to interrupt anyone's workflow)