![]() ![]() Now, you have successfully installed the macOS onto the USB flash drive to create a bootable installer for macOS. With the assistance of such an app, you are only a few clicks away from making a bootable macOS installer. It prompts "Copy complete and Done" when the process finishes.Įxcept for Terminal, you can also find an easier way to get the downloaded macOS installer onto your USB by using a third-party application.Type Y when it warns that the USB will be erased, then press Return/Enter.Enter your admin account password if asked and press Return/Enter.Press the Return/Enter key to run the command.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 Type the correct command from the following, and replace "MyVolume" with the name of your USB drive.Launch the Terminal utility on your Mac.Press the Command-Space key to open Spotlight, and search for Terminal.Connect your USB drive to the right port on your Mac.After downloading, the installer will open automatically, you should quit it to stop installing here. For older installers like macOS Sierra, OS X EI Capitan, and OS X Yosemite on Apple's website. You can use the links below to get the macOS installer in Mac Apple Store. The fact is that the installers of macOS High Sierra, Mojave, Catalina, and Big Sur are available in Mac Apple Store, but Apple hides them when you search for them in Mac Apple Store. You can get the latest macOS in System Preferences > Software Update and the Mac Apple Store, but you can't find macOS Mojave/Catalina/Big Sur in App Store or earlier versions of macOS there. The first step to creating a bootable USB for Mac is to get the macOS installer of the version you prefer on a healthy Mac. Because you need to get a compatible macOS installer to create a bootable USB for Mac, only such a bootable macOS installer works for your Mac. ![]() You should identify your Mac model and check which macOS/OS X can your Mac run. Using different USB ports also affects the speed. You should make sure the USB is compatible with your Mac's ports so that your Mac can successfully detect the USB flash drive. You can back up the USB or transfer important files and then format USB on Mac to get a clean flash drive. The size of the macOS installer has become larger and larger, the installer of Monterey is 12GB, and that of Big Sur is 13GB. Theoretically, an external hard drive such as SSD and HDD can also be used as a bootable macOS installer, but a USB flash drive is always recommended given that it will be quicker compared with a standard hard drive.
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