Apple Startup Disk History: An Example of Focus

I recently installed every version of Apple’s operating system that is compatible with the 1999 Blue & White G3 Power Mac – 11 major Mac operating systems: 8.5, 8.6, 9.0, 9.1, 9.2, 10.0, 10.1, 10.2, 10.3, 10.4, and Mac OS X Server 1.2.