Mac OS 9
From Misc Data Digs
Mac OS 9 is the last of the old-school Mac OSes before Apple moved to the more stable Mac OS X family.
About Box Easter Egg[edit | edit source]
In the finder, hold down the Option/Apple key. While holding this down, open the Apple menu and select "About This Computer". This will show the above picture of Apple's former headquarters in Cupertino, California. It will also scroll through the list of people who worked on the finder.