While we are here, it's macOS not MacOS, believe it or not.
Wikipedia:
https://en.wikipedia.org/wiki/MacOS
*macOS* (/ˌmækoʊˈɛs/
<https://en.wikipedia.org/wiki/Help:IPA/English>;^[8]
<https://en.wikipedia.org/wiki/MacOS#cite_note-8> previously *OS X* and
originally *Mac OS X*) is a Unix <https://en.wikipedia.org/wiki/Unix>
operating system^[9] <https://en.wikipedia.org/wiki/MacOS#cite_note-9>
developed and marketed by Apple Inc.
<https://en.wikipedia.org/wiki/Apple_Inc.> since 2001.
[And amusingly the Wikipedia convention for URL's forces them to have a
capital M.]
[And also, note macOS is classified as a UNIX operating system - which
it is.]
Andrew