OS X Lion
How to upgrade to OS X El Capitan
- Get system information about your Mac.
- Find out if your Mac can run OS X El Capitan.
- Back up your Mac.
- Get OS X El Capitan from the Mac App Store.
- Double-click Install OS X El Capitan to begin installation.
Download OS X Lion
If you need to purchase OS X Lion, you can order it from the Apple Online Store.