Apple Macintosh hidden message from 1984

Apple Macintosh Easter Egg. Back in 1984 when the Macintosh was first launched Apple had spent considerable time and money defending their intellectual property. Most notably was the court case between Apple and Franklin Computer Corporation which Apple won on appeal. The legal precedent set in this case in 1983 changed software copyright law. Subsequently to help Apple defend its rights it hid easter eggs inside the Macintosh ROMs so if they were ever copied it would be easy for Apple to prove.

[@lsfornells]

Wow, I’m an Apple Macintosh computer user since the early days, and never knew about that

[@sfdntk]

Huh, I thought it was supposed to display the "Stolen from Apple" icon designed by Susan Kare, featuring a little guy behind the bars of a jail cell? Andy Hertzfeld includes an image of it on the relevant folklore page if you haven't seen it. He also says the routine they wrote was supposed to enlarge the icon and display it prominently in the centre of the screen. Was this a different revision perhaps?
Either way, great video on a super interesting subject; I'd heard about this obviously but never seen it actually being displayed, so thanks very much!