You can use an external drive or secondary volume as a startup disk from which to lớn install the Mac operating system.
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These advanced steps are primarily for system administrators & other experienced users who are familiar with entering commands in Terminal.
You don"t need a bootable installer toupgrade macOSor reinstall macOS, but it can be useful if you want khổng lồ install macOS on multiple computers without downloading the installer each time, or you"re unable khổng lồ install a compatible macOS from the Finder or macOS Recovery.
USB flash drive or other secondary volume with at least 14GB of available storage, formatted as Mac OS Extended.
Depending on which macOS you downloaded, enter one of the following commands in Terminal as instructed above.
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If your Mac is using macOS Sierra or earlier, the command should conclude with--applicationpath followed by the appropriate installer path, as shown in the command below forEl Capitan.
sudo /Applications/Install macOS Ventura.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install macOS Monterey.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El Capitan.app