It was the result of a (later overturned) ruling in 2000: https://en.wikipedia.org/wiki/United_States_v._Microsoft_Cor...

So basically nothing happened in the end?

Apparently Microsoft invested into Apple around that time. Apple was doing poorly, and Microsoft “needed” a competitor to show that they are not completely dominating the market.

Right after the case was settled, Microsoft sold their shares again.

It’s said that this investment likely helped Apple survive through that period.

Given Apple’s market position right now, it’s not a stretch to assume this to be a direct result of the antitrust case against Microsoft.

evidently. but it was seriously considered. and they "only" controlled desktop at the time. which was everything. but still! :D