Create a bootable MacOS high Sierra installation USB drive

1. Download MacOS high Sierra installer from the Mac App Store. If the installer automatically opens after the download is complete, exit the installer. The installer will be located in your Applications folder. 2. Mount a USB flash drive or other volume. You can also use an internal alternate partition, which must have at least one GB of free disk space for the installation files. 3. Open the Terminal app, which is located in the Utilities folder of the Applications folder. Use the Createinstallmedia command in terminal to create a bootable installer. Make sure that the appropriate MacOS high Sierra installer is in your Applications folder, and then enter the following command in Terminal: Sudo/applications/install\ macos\ high\ sierra.app/contents /resources/createinstallmedia--volume/volumes/myvolume--It is important to note that high Sierra begins with a simplified statement. See below: High Sierra:createinstallmedia--volume Volumepathsierra and Earlier:createinstallmedia--volume Volumepath-- Applicationpath Installerpath

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Create a bootable MacOS high Sierra installation USB drive