While we are on the subject it is also worth pointing out additionally:

When saying Mac OS X, it’s pronounced Mac OS ten, not Mac OS ex.

https://www.youtube.com/watch?v=dHrVGk0WwYM

"Mac? Oh, Sex!" is how everyone pronounces it. Very few people "properly" say Mac Oh Ess Ten.

No, that's what perverts do with the Darwin native executable format.