MacOS is definitely Unix. Same syscalls, same command line, same permissions and virtual filesystem concepts. Pipes, text files, all that jazz. It uses zsh for scripting, PAM for authentication, CUPS for printing, OpenSSH for remote access, Unix sockets and virtual interfaces for networking.
Hell, a good chunk of macOS is straight up FreeBSD.
MacOS is definitely Unix. Same syscalls, same command line, same permissions and virtual filesystem concepts. Pipes, text files, all that jazz. It uses zsh for scripting, PAM for authentication, CUPS for printing, OpenSSH for remote access, Unix sockets and virtual interfaces for networking.
Hell, a good chunk of macOS is straight up FreeBSD.
Unlike most, macOS is also registered and can use the UNIX name.