I think it was more about Macs not being used for scientific applications much until the 2000s. Up until a bunch of programmers up and switched to MacBooks, Apples were more usually used by more artistic types. They were quite big for writing and art stuff, then, mostly, though pricey. And no separate monitors.
That came later as Windows became dominant but in the era Jurassic Park was written/filmed in, I think they were used for industrial and scientific uses as well.
