They also had adverts such as this one: http://www.brainmapping.org/MarkCohen/UNIXad.pdf [edit] also linked by mrpippy below.

There used to be things like this on Apple's website, too: https://www.apple.com/media/us/osx/2012/docs/OSX_for_UNIX_Us...

I can't find any mention of UNIX in Big Sur's pages, even though it is listed as certified on the Open Group's website.

Those are so cool, thanks for sharing. Can’t believe they got celebrity endorsements like Mark Cohen back then.

Yes, I do. I recall they had ads where they showed the amazing things you could do with one-line commands at the shell - they had examples of pipelines including grep and awk etc. I remember being amused that these familiar idioms that had been used in the Unix/Linux world for ages were being presented as amazing new capabilities.

For Mac users, this was a new capability. Before that, I was always using remote X sessions to get onto shared Unix systems.

What I found amusing at the time was, after years of touting the Mac point-and-click interface as a great improvement over the old-fashioned hard-to-learn obscure command line, they switched to touting the unprecedented power and versatility of ... the command line!

Yes, they got it certified with 10.5, I think. Small market these days, although I'm always surprised when I hear that both AIX and HP-UX are still receiving updates...

It worked on me! I bought a PowerBook G4 in 2003, when I heard Fink/MacPorts and Jaguar were no longer complete nightmares to use. Been Mac only since then.

That's what got me onto MacOS X for many years.