Here's a Titanium PowerBook G4 ad that says "Sends other Unix boxes to /dev/null": https://www.reddit.com/r/vintageunix/comments/b4kojo/sends_o...
Here's a snapshot of the software solutions page for the aluminum PowerBook G4 from November 2004, proudly touting Unix and even X11:
https://web.archive.org/web/20041126011836/http://www.apple....
Some quotes from the Power Mac G5 page (https://web.archive.org/web/20041126015955/http://www.apple....) from the same era:
"With the Power Mac G5, a researcher can now run both productivity applications and high-performance UNIX applications on a single system. Mac OS X Panther includes 64-bit optimized system math, vector and image libraries that take maximum advantage of the 64-bit G5 processor."
There was also a cluster in Virginia made of Power Mac G5s, which Apple also touted.
I also attended a marketing session at CERN, when they came to visit our IT department in 2003, when there were still people using Sun pizza boxes as their desktops (aka SPARCstation).
Anyone that has been around Apple long enough can recognise the old Apple (pre-OS X), on current Apple, now that they can be their old self.
Any good biography on Steve Jobs, like The Next Big Thing, Folkore or Cult of Mac, will show that underlying culture.