This whole saga starts with a very interesting blog post written by Pierre Dandumont in 2022. Pierre’s (excellent) blog is in French — Google does a good job of translating it for me. He found a quote in a book referring to special functionality bundled with Apple’s Macintosh Performa 550 computer:
If Apple’s programmers, in creating the Performa series, were aiming to make idiot-proof computers, they were serious about it. The Performa 550 is an amazing case in point. When you run the included Apple Backup program (see Chapter 15), you get a little surprise that you didn’t count on: a hidden partition on your hard drive!
This invisible chunk of hard drive space contains a miniature, invisible System Folder. Apple’s internal memo explains it this way:
“When a system problem (one that prevents the Performa from booting) is detected, a [dialog box] informs the user of a system problem. The user can choose to fix the problem manually or to reinstall software from the backup partition’s Mini System Folder.”
This story is wild. I mean, just look at this user interface hidden away with this backup program:
