Mac clean install high sierra4/3/2023 ![]() There might be old copies of Lion, Mountain Lion, and even Snow Leopard for sale on sites like eBay. 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. macOS will provide a summary of everything that will be removed from your Mac if you choose to proceed. Enter the password you use to unlock your Mac. At the top of the screen in the menu bar, click on System Preferences > Erase All Content and Settings. If you have a valid Apple Developer account, you might be able to download older versions from /downloads. To get started, launch System Preferences. 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. Let the installation process to complete and your Mac will reboot. Then choose the startup drive to install the macOS High Sierra. This time, select Install macOS > Continue. ![]() ![]() ![]() Mac App Store Links for Older macOS Downloads Once the startup drive has been formatted, close Disk Utility and go back to the macOS Utilities window.
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