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. Connect the USB flash drive or other volume you're using for the bootable installer.Use the 'createinstallmedia' command in Terminal Then find the installer in your Applications folder as a single ”Install” file, such as Install macOS Catalina. Windows OS doesn't natively support DMG disk image files, so if you need to create a bootable USB drive from a DMG file, mostly for bootable Mac OS X or macOS installation USB, you need a special utility to help you complete the task. DMG file is a compressed file format being used widely on Mac computer. Second, see this How To outline for creating a bootable El Capitan installer. Bootable USB Installers for OS X Mavericks, Yosemite, El Capitan, and Sierra First, review this introductory article: Create a bootable installer for macOS. Make sure the copy of “Install OS X El Capitan” is there on /Applications folder. Step 3: Now the USB Drive is ready for OS X El Capitan installation. Step 2: Select the USB Drive from the list and on the Right side, select “Erase” tab and rename the USB drive as “Untitled” and click on Erase to perform the operation.
In this easy tutorial you will learn how to create a bootable dvd or usb pendrive from a DMG file under Windows 7 to 10.
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