![]() To begin, you need the installer for whatever version of macOS you want on a thumb drive. There might be old copies of Lion, Mountain Lion, and even Snow Leopard for sale on sites like eBay. First, Download macOS From The Mac App Store. 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. The window that opens might look different from the example shown here, but it always includes the macOS name followed by its version number. If you have a valid Apple Developer account, you might be able to download older versions from /downloads. Which computers can use the latest macOS versions Which macOS is installed From the Apple menu in the upper-left corner of your screen, choose About This Mac. This will put an installation app in your Applications folder, which you should leave there. The files are now located in /macOS\ Install\ Data. Run installer, which downloads installer files, stop installer when it asks to restart. Once any of these downloads are complete, mount the. Use the App store (recommended) Download 'Install macOS High Sierra.app' from App Store. Your Mac might be up-to-date as far as High Sierra (released 2017) goes but its running an old, unsupported operating system which is four major versions. Leave the installation app in your Applications folder.ĭirect Disk Image Links for Older macOS Downloads Configure for anywhere access from your desktop or. ![]() The files are now located in /macOS Install Data. Once any of these downloads finishes, do not open the installer to begin the installation. High performance web and self-services access to virtual apps and desktops. Use the App store (recommended) Download Install macOS High Sierra.app from App Store. Mac App Store Links for Older macOS Downloads
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