>You'd think the developer/QA that worked on that particular feature would have manually tested it at least once. Or anyone else, it is seemingly not a hidden,

>You'd think the developer/QA that worked on that particular feature would have manually tested it at least once. Or anyone else, it is seemingly not a hidden, elusive bug that can only be caught when a number of particular conditions concurrently happen. According to Matheus Mariano (that seemingly was the first to find it and report to Apple): https://news.ycombinator.com/item?id=15408258 https://news.ycombinator.com/item?id=15408258 https://medium.com/@matheusmariano/new-macos-high-sierra-vulnerability-exposes-the-password-of-an-encrypted-apfs-container-b4f2f5326e79 https://medium.com/@matheusmariano/new-macos-high-sierra-vul... The only needed condition is that the Mac has a SSD, and in his words: "I really don’t know how this went unnoticed by Apple (and anyone else). "