Wow, seriously?
Fun fact. macOS (formerly OS X) Got many of its design cues from HP-UX, IBM AIX, Solaris, and Silicon Graphics (SGI). I managed a fleet of these UNIX systems, so had a distinct vantage point to notice it. I wouldn’t blame anyone else for not noticing. OS X was absolutely revolutionary, but also had some design inspiration from the systems before it.
Anyways, just know that any system you’re using today (Mac, Windows, Linux) was inspired by SGI and the other UNIX platforms.