The installer for macOS will boot from it. Select the drive on which you wrote the installation program. ![]() You will be asked which drive to boot from: Turn on the Mac while holding down the Option key. Shut down the Mac, then connect your installation disk. Now that you’ve created an external installer, you’ll need to boot from it on your target Mac. Hopefully you get the idea: you need to run the script in the installer yourself, point to your drive, and then point to the installer. Outsider:: sudo /Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia -volume /Volumes/Installer -applicationpath /Applications/Install OS X Mavericks.app.Yosemite: sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/Installer -applicationpath /Applications/Install OS X Yosemite.app.Captain: sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/Installer -applicationpath /Applications/Install OS X El Capitan.app.Sierra: sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Installer -applicationpath /Applications/Install macOS Sierra.app. ![]() Here is the full command for some newer versions: Earlier versions of macOS have slightly different names. The above command is specifically for High Sierra (and a hard drive called the “Installer”). ![]() Note that the Utilities folder offered by DiskMaker X does not exist here. The process will take a while, but when it’s done you will have a bootable drive with the installer on it.
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