: On your modern Mac, you can't just double-click to install. You must bridge the gap between decades. You use modern tools like UTM or QEMU to mount the ISO on your M1 Mac, just to see that smiling "Happy Mac" face again.

If you have an iMac G3, Power Mac G4, iBook G3, or PowerBook G4 (pre-2003), you can create a real OS 9 boot disc.

Mac OS 9.0, also known as "ShanDong," was first released on October 23, 1999. This operating system was the successor to Mac OS 8.6 and was a crucial step towards the eventual release of Mac OS X, which would revolutionize the Mac lineup. Mac OS 9.0 was designed to be more efficient, stable, and user-friendly than its predecessors. It introduced several features that are still cherished today, such as improved multitasking, a revamped Finder, and enhanced support for multiple users.