The first Macs were 8 MHz 68000 chips. The GUI was still very responsive. The menus popped down and Quickdraw (the graphics library) properly handled arbitrar

The first Macs were 8 MHz 68000 chips. The GUI was still very responsive. The menus popped down and Quickdraw (the graphics library) properly handled arbitrarily shaped overlapping windows. There was a demo with a round window and windows in the background updated perfectly. Bill Atkinson invented the Regions data structure (and the rest of Quickdraw) that allowed among other things, background windows graphics calls to be clipped to arbitrary combinations of foreground windows super efficiently. Atkinson is one of the greats. https://www.folklore.org/StoryView.py?project=Macintosh&story=I_Still_Remember_Regions.txt https://www.folklore.org/StoryView.py?project=Macintosh&stor... https://www.folklore.org/StoryView.py?project=Macintosh&story=Negative_2000_Lines_Of_Code.txt&sortOrder=Sort+by+Date&topic=Management https://www.folklore.org/StoryView.py?project=Macintosh&stor...