Instead, the operating system was said to be available exclusively as a download from the Mac App Store for US$29.99. Īpple did not initially announce any physical media distribution for Lion, such as a set of CD-ROMs or a DVD-ROM as used for past releases. The specific release date of July 20 was not confirmed until the day before, July 19, by Apple CFO, Peter Oppenheimer, as part of Apple's 2011 third-quarter earnings announcement. On June 6, 2011, at the Apple Worldwide Developers Conference, it was announced that the official release for Lion would be in July 2011. Release and distribution OS X Lion was announced alongside iOS 5 and iCloud at WWDC 2011 at Moscone West. The same practice was applied to its successor, OS X Mountain Lion. Īlthough originally paid, Apple later allowed free downloads of the OS, especially for customers of older and no longer officially supported Mac computers, starting on June 30, 2021. Lion is the first version of macOS that did not support 32-bit processors and is also the final release whose development was overseen by Bertrand Serlet, considered to be the "founding father of Mac OS X". As of October 2011, OS X Lion had sold over six million copies worldwide. Apple reported over one million Lion sales on the first day of its release. Lion was released to manufacturing on July 1, 2011, followed by its final release via the Mac App Store on July 20, 2011. Other developer previews were subsequently released, with Lion Preview 4 (11A480b) being released at WWDC 2011. On February 24, 2011, the first developer's preview of Lion (11A390) was released to subscribers to the Apple Developer program. 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. When the clone is completed you have a fully bootable installer that you can use without having to re-download Mountain/Lion.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 Mac computers.Ī preview of OS X 10.7 Lion was publicly shown at the "Back to the Mac" Apple Special Event on October 20, 2010. Double-check you got it right, then click on the Restore button.Drag the mounted disc icon from the Desktop into the Source entry field.Select the USB flash drive volume from the left side list and drag it to the Destination entry field.Click on the Restore tab in the Disk Utility main window.Select the USB flash drive from the left side list.Double-click on the InstallESD.dmg file to mount it on your Desktop.You are going to clone the content of the InstallESD.dmg disk image to the flash drive as follows: Plug in your freshly prepared USB flash drive. Insert the Lion DVD into the computer's optical drive.ģ. The format process can take up to an hour depending upon the flash drive size.Ģ. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click the OK to return to the Erase window.Click on the Erase tab in the DU main window. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list.Click on the Partition button and wait until the process has completed. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Under the Volume Scheme heading set the number of partitions from the drop down menu to one.Click on the Partition tab in the DU main window. After DU loads select your flash drive (this is the entry with the mfgr.'s ID and size) from the left side list.Open Disk Utility in your Utilities' folder.Get a USB flash drive that is at least 8 GBs. Make A Bootable Lion or Mountain Lion USB Installerġ. Instead, it was booting from the local startup drive which had no installed system.ĭo you have a working copy of the Lion installer? Have you set the date back? If you have the Lion installer, then you can create a USB flash drive installer. I would guess that all four keys were not fully depressed during the startup.
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