Originally a paid upgrade, Apple now provides the Mac OS X Lion installer for free to support users with legacy hardware.

Mac OS X Lion represents a key piece of Apple history—the bridge between the classic Mac OS era and the modern iOS-inspired design language we see today. While finding a working ISO takes a bit of digging, running it today is a fascinating look at how far macOS has come.

To run Mac OS Lion, your Mac should meet the following system requirements: