Didn’t Apple try to claim copyright for gui against MS widows but some Computer scientist had demonstrated it at Stanford.
Xerox was the first with a graphical user interface “GUI”. I believe the guys from Apple were given a demonstration of it.
And the rest is history...
Apple also stole the mouse from Xerox’s Palo Alto research center when Steve Jobs saw it demonstrated on a visit and to this day many people still believe Apple invented it.
They also don’t give Woz enough credit for apple’s early products. His work on their first CPUs was simply brilliant.
Yes, Microsoft was able to show that both Macintosh OS and Windows were derived from the earlier Xerox PARC gui.