[mmjaa]

The thing that really shocks me about this incident is that, basically checking that "root cannot be logged in under any unusual circumstances" is a fundamental, basic test of any OS development group, and there must have been at least 2 decades of this test running somewhere internally at Apple, and .. somehow .. thats not happening.

Like, I seriously hope this was just an oversight in the testing system somehow - but I'm really rather concerned that Apple is not testing these things as rigorously as it should be/used to be.

This is such a fundamentally corrupt security issue that we all have to increase our levels of suspicion over the QA team at Apple. Truly a shocking hole.