You have experience with them and you are trying to pretend a guide written for them will work on MacOS. I’m glade to know you are not misinformed but actively disingenuous.

I stand by my point. Unix semantics don’t really exist in a meaningful manner. The SUS gives you very little.

To get back to the Windows side discussion, you can get a POSIX compliant shell on Windows in minutes nowadays be it Cygwin, gsh, git shell or WSL if you don’t mind using virtualisation and the C headers defined in the XBD are also minutes away. The days when developing on Windows was painful are long gone.

The rational for MacOS at this point for me is pretty much limited to “I want a MacBook as a status symbol”, same than the iPhone. They are nice machines. They are just far too expensive for what they do imho at least in Europe where Apple prices them significantly higher than in the US.

Try to call fork() on Windows.