OS X Lion, also known as Mac OS X Lion, (version 10.7) is the eighth major release of macOS, Apple’s desktop and server operating system for Macintosh computers.
A preview of Mac OS X 10.7 Lion was publicly shown at the “Back to the Mac” Apple Special Event on October 20, 2010. It brought many developments made in Apple’s iOS, such as an easily navigable display of installed applications, to the Mac, and includes support for the Mac App Store, as introduced in Mac OS X 10.6 Snow Leopard version 10.6.6. On February 24, 2011, the first developer’s preview of Lion (11A390) was released to subscribers to the Apple Developer program. Other developer previews were subsequently released, with Lion Preview 4 (11A480b) being released at WWDC 2011.
Lion was released to manufacturing on July 1, 2011, followed by its final release via the Mac App Store on July 20, 2011. Apple reported over one million Lion sales on the first day of its release. As of October 2011, Mac OS X Lion had sold over six million copies worldwide.
Lion is the final release whose development was overseen by Bertrand Serlet, considered the “founding father of Mac OS X”.
Although originally paid, Apple later allowed free downloads of the OS, starting on June 30, 2021.
Mac OS X 10.7 Lion is available for older systems that are not compatible with the latest version of macOS and requires the following:
Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
OS X Snow Leopard 10.6.6 or later or OS X Lion 10.7 already installed
2GB of memory
7GB of available space
Some features require an Apple ID; terms apply.
Some features require a compatible Internet service provider; fees may apply.
Any Mac that shipped with Mac OS X Mountain Lion or later will not be compatible with this installer.