If this was Steve's personal cube. It very well might have been the first computer to run what we now call "Mac OS X"
You can still get Next Step. It is available for free download. It is pretty much a 1980's version of Mac OS X.
in Fact, When Steve returned to Apple the OS was part of the deal Steve didn't want Copland OS to be the next OS inside an Apple computer and fight for his NextStep OS / Open Step OS before Bill Gates turn Apple into an HP running Windows too. It was a fight of power and that's how he push OpenStep OS in disguise. Mac OS X was the same OS since day One. only with an eye candy look to fool the ones who knew. In fact even with all the hate to Adobe Flash it was with Flash that he saw Aqua implemented on a prototype version of the new OS X the first time. go figure!