perhaps that was involved, but one thing clearly purposeful was people were seriously filtered for particular skills and personality (apple fit it was called back then), which created groups where individuals had unique skills and collectively the group members would naturally want to collaborate. it worked great.

(as an aside, this contrasts diametrically with Amazon, where i worked for a year for healthcare, not needing to because of Apple years' savings, but after a genomics startup i had joined ran out of funding, and wanting a new challenge; there skilled engineering types were presumed to be fungible assets for (not kidding) at least 7 layers of do-nothing bureaucrats making huge salaries...they could survive because sales on the amazon store extract something like the 30% royalty to amazon)