These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
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![]() Download macOS
The first part of the process is to format a USB drive such that it is bootable on a Mac. Find a USB drive, of 2GB capacity or more, and plug it into the Mac. Launch the Disk Utility app which is located in Applications Utilities. Partition the USB drive. Mar 30, 2020 Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4 ), and press Enter. Enter the clean command and press Enter. Type the convert GPT command and press Enter. Enter the create partition primary command and press Enter to complete the process.
Find the appropriate download link in the upgrade instructions for each macOS version:
macOS Catalina, macOS Mojave, ormacOS High Sierra
Installers for each of these macOS versions download directly to your Applications folder as an app named Install macOS Catalina, Install macOS Mojave, or Install macOS High Sierra. If the installer opens after downloading, quit it without continuing installation. Important: To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
OS X El Capitan
El 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. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer. Use the 'createinstallmedia' command in Terminal
* If your Mac is using macOS Sierra or earlier, include the
--applicationpath argument, similar to the way this argument is used in the command for El Capitan.
Use the bootable installerHow To Create Bootable Pendrive For Mac Os X 10 11 Download Free
After creating the bootable installer, follow these steps to use it:
Learn more
For more information about the
createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal:
Catalina:
Mojave:
High Sierra:
How To Create Bootable Pendrive For Mac Os X 10 11
El Capitan:
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