There might be old copies of Lion, Mountain Lion, and even Snow Leopard for sale on sites like eBay. If you need to know the build number as well, click the version number to see it. The window that opens may look different from the example shown here, but it always includes the macOS name followed by its version number. Non-developers can buy OS X Mountain Lion ($19.99) and OS X Lion ($19.99) from Apple directly. Apple will email you an unlock code, which you can redeem in the Mac App Store. Mac OS (originally System Software retronym: Classic Mac OS) is the series of operating systems developed for the Macintosh family of personal computers by Apple Computer from 1984 to 2001, starting with System 1 and ending with Mac OS 9.The Macintosh operating system is credited with having popularized the graphical user interface concept. From the Apple menu in the upper-left corner of your screen, choose About This Mac. Public beta: Kodiak Version 10.0: Cheetah Version 10.1: Puma Version 10.2: Jaguar Version 10.3: Panther Version 10.4: Tiger Version 10. History of macOS versions in order In this definition. If you have a valid Apple Developer account, you might be able to download older versions from /downloads. Today, all Mac devices, including iMac, iMac Pro, MacBookPro, MacBook Air, and Mac Mini, come with the latest version of macOS pre-installed. This will put an installation app in your Applications folder, which you should leave there. Once any of these downloads are complete, mount the. Leave the installation app in your Applications folder.ĭirect Disk Image Links for Older macOS Downloads Once any of these downloads finishes, do not open the installer to begin the installation. Mac App Store Links for Older macOS Downloads
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