As pointed out by amiga386 both here[1] and in earlier posts, macOS is not actually compliant with the Unix spec and never has been. This has apparently not bee

As pointed out by amiga386 both here[1] and in earlier posts, macOS is not actually compliant with the Unix spec and never has been. This has apparently not been a hindrance for the certification of every single non-compliant version. Unix certification for Apple might not involve anything other than payment. [1]: https://news.ycombinator.com/item?id=45239534 https://news.ycombinator.com/item?id=45239534