![]() Select the bootable installer, then click Continue. Turn on the Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes, including the bootable installer. A bootable installer doesn't download macOS, but it does need an internet connection to get firmware and other information for this Mac model. This Mac must be able connect to the internet. If it isn't, it might start up to a circle with a line through it. ![]() This Mac must be compatible with the macOS that you're installing. Mac with Apple siliconĬonnect the bootable installer to the Mac. Sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume -applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app Use the bootable installerįollow the appropriate steps based on whether the Mac receiving the macOS installation is a Mac with Apple silicon. Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume El Capitan: Sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume High Sierra: Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Mojave: Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Catalina: Sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Big Sur: Sudo /Applications/Install\ macOS\ Ventura.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Monterey: Sudo /Applications/Install\ macOS\ Sonoma.app/Contents/Resources/createinstallmedia -volume /Volumes/MyVolume Ventura: If the Mac you're using to create the bootable installer is using macOS Sierra or earlier, append -applicationpath to your command, followed by the appropriate installer path, similar to what is shown in the command below for El Capitan. ![]() Replace MyVolume in the command with the name of your volume, if different. You can now quit Terminal and eject the volume.ĭepending on which macOS you downloaded, enter one of the following commands in Terminal as instructed above. When Terminal says that the install media is now available, the volume will have the same name as the installer, such as Install macOS Sonoma. If Terminal can't erase successfully, use Disk Utility to erase the volume using Mac OS Extended (Journaled) format, then start again from the beginning.Īfter the volume is erased, you might see an alert that Terminal would like to access files on a removable volume. Terminal shows the progress as the volume is erased. 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. When prompted, type your administrator password. If it has a different name, rename it or replace MyVolume in the command as needed. Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive. Type or paste one of the commands below into Terminal, then press Return to enter the command. Open Terminal, which is in the Utilities folder of your Applications folder. If more space is needed, Terminal will let you know.Ĭonnect the USB flash drive directly to your Mac. ![]() When you create the bootable installer, this volume will automatically be erased.Ī 32GB USB flash drive has more than enough storage space for any macOS installer, and 16GB is enough for most earlier versions of macOS. It should be an app, not a disk image (.dmg) or package (.pkg) that contains the installer.Ĭonnect a USB flash drive or other secondary volume to your Mac. Make sure that the installer is named Install, such as Install macOS Sonoma. This is the folder that opens when you choose Go > Applications from the menu bar in the Finder. Make sure that the installer is in the Applications folder of your startup disk. Find out which macOS your Mac is using.Įnterprise administrators: Download from Apple, not a locally hosted update server. Use the bootable installer Download a full macOS installer from Appleĭownload macOS from the App Store or your web browser using the links provided in How to download and install macOS.ĭownload from a Mac that is using the latest version of OS X El Capitan or later and is compatible with the macOS you're downloading. Use Terminal to create the bootable installer You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or if you can't install a compatible macOS from the Finder or macOS Recovery.ĭownload a full macOS installer from Apple These advanced steps are primarily for system administrators and other experienced users who are familiar with entering commands in Terminal.
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