Last time my Mac had some startup problems and I went to the Genius Bar for a clean OS installation. The technician took out a hard drive called “KG” and booted my Mac from a recovery partition on it.
Just for curiosity, I want to know what are included on the “KG” drive. During booting, I saw a lot of normal and recovery partitions of different macOS versions. It would be interesting to know what other partitions/special tools are on the drive (and perhaps it would be handy for me to have a similar drive if I encountered similar problems again).
The only thing I know is the appearance. It should be a LaCie 2TB Rugged Thunderbolt + USB-C, with the “LACIE” trademark replaced by an Apple logo and the two uppercase characters “KG”. I think the words “Genius Bar” are also printed on it, if I recall correctly.
Any help is appreciated.