![]() Type (or copy and paste) this command into Terminal, replacing Untitled with the name of your drive, then press Enter: sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install\ macOS\ Sierra.app -nointeraction &say Done.Open up Terminal (Applications > Utilities).It’s best to disconnect any other external hard drives or flash drives so you don’t mix them up. Before you do so, back up any important data on that drive. If it isn’t, open up Disk Utility and format is so it is. Make sure the drive is formatted for OS X Extended (Journaled). For this tutorial, we’ll use the name Untitled. Insert an 8GB (or larger) flash drive and give it a name.If you don’t want to download an extra bit of software, you can make your own installer USB drive using Terminal. When it’s done, insert your USB drive into any Mac, then launch the installer by holding down the Option key when you boot up your computer. Select your flash drive from the drop-down menu.This is should be located in your Applications folder. Open Disc Creator and click the “Select the OS X Installer” button.If you have any other data on that flash drive, back it up now, because the installer will delete everything on it. Insert an 8GB (or larger) flash drive.Download the macOS Sierra installer and Disk Creator.The easiest way to create a USB flash installer is with the free program, Disk Creator. ![]()
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