Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Sierra.app -nointeraction It may be best to just copy it from here (try triple-clicking) and paste it in. Launch Terminal (Finder/Applications/Utilities/Terminal)Įnter the following text into Terminal. If your drive is named something else, you need to rename it (Open Finder -> right click on the USB drive and choose Rename).When the process is complete, click Done, and close the Disk Utility window. Select Mac OS Extended (Journaled) from the format list. Click the Erase tab at the top of the Disk Utility window.To format a USB drive launch Disk Utility (Finder -> /Applications/Utilities/Disk Utility).Create a bootable flash drive with macOS Sierra.įirst, make sure your USB flash drive is formatted and named as “Untitled”.This flash drive is only needed for a clean install on your Mac’s startup drive. Take a 16GB or larger USB flash drive to create a bootable Sierra installer.Quit macOS Sierra Installer app without performing the installation. Once the download completes, it will automatically launch.
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