Note: this is off-memory, details might be wrong, correct me in comments.
Steve Jobs got fired from Apple for spending an insane amount of development resources and marketing in the original Macintosh (the literally 1984 Macintosh ad).
So they kicked Jobs and he went to create this company called NEXT who made these next-level hightech computer workstations called NEXT Stations, that ran an OS called NextStep.
The OS was very advanced. It look good and it worked wonders.
The NEXT machines became the standard High-End tech company computer. John Romero loved those things. Quake was written entirely on the first NEXT stations they bought for their office after DOOM iirc.
They were the pinnacle of "expensive productive computer" from 88 to 93. Basically they were the SGI workstations but not for graphics and more affordable.
And their OS (NextStep) inspired some of the look and feel of versions of MacOS after MacOSX (2001).
NextStep went to become OpenStep and later became GNUStep and a compatibility development environment
But all that I really care about it is: The window maker: The desktop environment, the stuff you use, the desktop.
And so although I love CDE (another Unix workstation desktop environment) WindowMaker (the reimplementation for xorg) seems so flipping cool.
(it is still somewhat maintained BTW It's not abandoneware)
Also #NextStep used Objective C and so MacOSX onwards was also programmed in that until 2014 when Swift was introduced.







