Macworld A lot of Mac users don’t remember a time before Mac OS X (or macOS, or OS X, depending on the era), but before OS X arrived on the scene, the Mac ran on an entirely different operating system ...

The Basilisk II emulator can be used to run old versions of Mac OS 8 and System 7 on a modern Mac. Here's how to get started using it. Before macOS and OS X, there was Mac OS 9, and before that were ...