![]() ![]() Once step 2 completes, you can boot from the USB installer by restarting the Mac and immediately hold down the option key until the Startup Manager icons appear. sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Choose the following options.Įnter the following command in a Terminal application window. Use the Disk Utility application to erase the flash drive. The instructions for creating the USB installer can be found at the Apple website How to create a bootable installer for macOS. ![]() The installer will appear in the Applications folder, as shown in image below. ![]() When finished downloading, you will get the popup message shown below. The download will appear as a software update, as shown in the image below. High Sierra appears in the App Store as shown in the image below. High Sierra can be downloaded from Mojave by selecting Get macOS High Sierra on the Apple website How to upgrade to macOS High Sierra. ![]()
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