[daniel_grady]

> For instance, macOS is a Unix™. It passes the tests, and Apple pays for the certification. But it hides most of the real Unix directory tree, its /etc is relatively empty, it doesn't have an X server – it's an optional extra. And most of all, it's not case sensitive.

What does it mean for the operating system to be “case sensitive”? Certainly APFS is case sensitive, so this must refer to something else?

[wtallis]

OS X / macOS has always defaulted to using filesystems that are case-preserving but not case-sensitive. You can cd to ~/library and see the contents of ~/Library and trying to mkdir ~/library will fail because ~/Library exists.

[daniel_grady]

Amazing, I can check off “learn something” early today!