I'm sure many of us can often see how some kinds of bugs managed to slip through...

		mcintyre1994 on Nov 28, 2017 \| parent \| context \| favorite \| on: macOS High Sierra: Anyone can login as “root” with... I'm sure many of us can often see how some kinds of bugs managed to slip through testing/QA, but this is crazy to me given it works on the login screen if it's happening for everyone on whatever version: is "user cannot log in as root when root account is disabled" not a test case? That seems.. insane?

There are thousands of ways you could test this. Like most tests, having them isn't the same as having good ones.