![]() #BALENAETCHER CATALINA INSTALL#How to Boot with macOS Catalina USB Install Drive * If you see a “command not found” error message in the terminal, it’s likely because there was a typo or syntax error, or because the “Install macOS Catalina.app” application file was not found in the /Applications/ folder where it is expected to be. The MacOS Catalina boot disk can be used with any MacOS Catalina compatible Mac. At this point it can be used like any other boot disk or installation disk. Let the creation process build the boot installer disk and complete, it may take a little whileĪfter the MacOS Catalina 10.15 USB boot installer drive has been created, it will be mounted on the Mac.If the syntax is correct, hit the Enter/Return key and authenticate with the admin password as necessitated by sudo.Sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia -volume /Volumes/UNTITLED Enter the following command at the Terminal command line, assuming “UNTITLED” is the name of the USB flash drive you want to make into the Mac Catalina installer boot disk:.Open the “Terminal” application, it’s found in the Utilities folder and you can also launch it from hitting Command Spacebar typing Terminal and hitting return.Connect the USB flash drive to the Mac if you haven’t done so already, name the drive “UNTITLED”.Mistakes with syntax can lead to permanent data loss, or the erasure and formatting of the wrong disk, so proceed at your own risk. This process requires using the command line, if you are not comfortable using the Terminal than it is better to avoid this process. How to Make a Bootable macOS Catalina 10.15 Beta USB Installer Drive The Mac will also need to be online so that it can download the MacOS Catalina installer, if that hasn’t already be accomplished. Knowledge and understanding of the command line and Terminal.A complete “Install macOS Catalina.app” installer application residing in the /Applications/ folder on the Mac (you can download full macOS installers from Terminal with these instructions on newer MacOS releases, otherwise use the MacOS Catalina download link via App Store).USB flash drive (16GB or larger) – this will become the boot install driver for MacOS Catalina, it will be formatted so any data on this drive will be erased to become the boot installer.The following prerequisites are necessary to make a bootable installer drive for macOS Catalina: Requirements to Create a Bootable macOS Catalina USB Install Drive #BALENAETCHER CATALINA HOW TO#We’ll walk through how to create a boot USB install drive for MacOS Catalina 10.15. Bootable USB installers offer an easy way to upgrade multiple Macs to macOS Catalina, to perform clean installs of MacOS Catalina, to perform maintenance from a boot disk like formatting disks, modifying disk partitions, and performing restorations, and much more. ![]()
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