macOS Lion, also known as OS X 10.7, is a major release of Apple's operating system for Macintosh computers. It was announced on June 5, 2011, and was released on July 20, 2011. macOS Lion introduces several new features, including:
: Locate the downloaded InstallMacOSX.dmg in your Downloads folder and double-click it to mount the image. mac lion os x 10.7 - installesd.dmg download