![]() Plug the bootable installer into a compatible Mac. You can now quit Terminal and eject the volume.Īfter creating the bootable installer, follow these steps to use it: When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina. Terminal shows the progress as the bootable installer is created. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal doesn't show any characters as you type your password. When prompted, type your administrator password and press Return again. Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume If it has a different name, replace MyVolume in these commands with the name of your volume. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. Type or paste one of the following commands in Terminal. Open Terminal, which is in the Utilities folder of your Applications folder. Make sure that it has at least 12GB of available storage and is formatted as Mac OS Extended. pkg installer.Ĭonnect the USB flash drive or other volume that you're using for the bootable installer. You will create the bootable installer from this app, not from the disk image or. ![]() It installs an app named Install OS X El Capitan into your Applications folder. ![]() On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. pkg installer.Įl Capitan downloads as a disk image. It installs an app named Install OS X El Capitan into your Applications folder. DMG version, then.Įl Capitan downloads as a disk image. You can now quit Terminal and eject the volume. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Catalina.When prompted, type Y to confirm that you want to erase the volume, then press Return.When prompted, type your administrator password and press Return again.Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app If it has a different name, replace MyVolume in these commands with the name of your volume. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. Type or paste one of the following commands in Terminal.Open Terminal, which is in the Utilities folder of your Applications folder.Connect the USB flash drive or other volume that you're using for the bootable installer. ![]() Use the 'createinstallmedia' command in Terminal Do you have another Mac or friend with a Mac?Įl Capitan downloads as a disk image. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg.
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