Macos high sierra installer usb5/20/2023 ![]() ![]() 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. Connect the bootable flash drive containing the macOS. If you have a valid Apple Developer account, you might be able to download older versions from /downloads. Follow the instructions for how to create a bootable macOS Sierra installer on a USB flash drive. This will put an installation app in your Applications folder, which you should leave there. Once any of these downloads are complete, mount the. Visit Stack Exchange Tour Start here for quick overview the site Help Center Detailed answers. Within a few seconds, a macOS Utility screen should pop up 7. Connect your macOS High Sierra bootable USB 6. Hold down Command () + R to boot into recovery mode 5. Click on Startup Disk and select the installer 3. Leave the installation app in your Applications folder.ĭirect Disk Image Links for Older macOS Downloads communities including Stack Overflow, the largest, most trusted online community for developers learn, share their knowledge, and build their careers. To install High Sierra from a USB using your startup disk drive: 1. ![]() 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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