I looked it up as I was curious.

Apple and Microsoft both licensed some interface stuff from Xerox and they were both working on a windows like OS.

Apple was ahead, and gave them a sneak preview.

Then I guess MS wanted to do something like that and told Apple they’d give them time a frame they wouldn’t release anything in (like a year or two later after apple released it) and then they said fuck it and released it early.

Then Apple sued MS.

So MS stole good parts of windows from Apple.