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 ...

macOS Monterey version 12 is a stable, lightweight upgrade that works great on older Macs, and you can use the direct DMG or ISO links to download, install, upgrade, or downgrade your system easily.

Run Windows XP, Mac OS 9, Windows 11, Super Mario Bros. and more on your Mac. Screenshot: D. Griffin Jones/Cult of Mac Collecting old video game consoles and vintage computers is a fun hobby, but ...