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Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ macOS\ Sierra.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ macOS\ High\ Sierra.app Paste that entire command line from below at the Terminal's prompt: Choose the appropriate command line (in red) depending upon what OS X installer you want. Open the Terminal in the Utilities' folder. Click on the Apply button and wait for the Done button to activate.

Set the Format type to Mac OS Extended (Journaled.) In the drop down panel set the partition scheme to GUID.

Click on the Erase tab in the Disk Utility toolbar.

After Disk Utility loads select the drive (out-dented entry with the mfg.'s ID and size) from the side list.

Open Disk Utility in the Utilities' folder.

You will need an 8GB or larger USB flash drive that has been partitioned and formatted for use with OS X. Simply replace the Terminal command with the one from the preceding article by copying it into the Terminal window. Second, see this How To outline for creating a bootable El Capitan installer. Sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller -applicationpath /Applications/Install\ OS\ X\ Mavericks.Bootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierraįirst, review this introductory article: Create a bootable installer for macOS. Sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller -applicationpath /Applications/Install\ OS\ X\ Yosemite.app -nointeraction Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/FlashInstaller Note that they use the example name FlashInstaller for our USB drive, so if you named your drive something else, use that name.

In the Terminal window that opens, enter one of the following commands, depending on which OS X or macOS installer you're working with. Alternatively, enter Terminal into Spotlight Search to quickly start up the utility.