MacOS is actually the only desktop OS that’s officially a Unix OS (meaning it’s officially certified). The others are mostly mainframe OSes. https://www.opengroup.org/openbrand/register/
Linux is “Unix-like”, but it’s not actually Unix. Linux was inspired by Minix, not by Unix.
People sometimes confuse Unix with POSIX. MacOS is also fully POSIX compliant whereas Linux is mostly POSIX compliant (but don’t think it’s quite 100% especially with newer POSIX standards).
I would say that both osx and Linux are flavors of Unix, not that macs run Linux.
MacOS is actually the only desktop OS that’s officially a Unix OS (meaning it’s officially certified). The others are mostly mainframe OSes. https://www.opengroup.org/openbrand/register/
Linux is “Unix-like”, but it’s not actually Unix. Linux was inspired by Minix, not by Unix.
People sometimes confuse Unix with POSIX. MacOS is also fully POSIX compliant whereas Linux is mostly POSIX compliant (but don’t think it’s quite 100% especially with newer POSIX standards).