Mac OS X (10.7) - OS X Lion Overview

This document provides a general overview of Mac OS X 10.7 (Lion), which was released in 2011.

Introduction

Apple has a summary of Lion's technical specifications and features here: https://support.apple.com/kb/sp629

For additional support information, please see: https://support.apple.com/lion

The minimum system requirements for OS X 10.7 are:

Noteworthy changes to OS X Lion