Technically, you can still use Disk Utility to make a bootable USB drive, but the process is more complicated than it's worth. Unfortunately, that Disk Utility method does not work for the newest Mac OS X 10.9 (Mavericks) that was released as a free download on Tuesday. So, if you wanted a backup install disc in case something went wrong, or in case you wanted to install Mac OS X on your computer without signing into the Mac App Store, you'd have to create a bootable DVD or USB drive yourself using the InstallESD.dmg, which was an easy process using Disk Utility.
You can now quit Terminal and eject the volume.There hasn't been any physical installation DVDs available for Mac operating systems since Snow Leopard (10.6), with Lion (10.7) and Mountain Lion (10.8) both available via the Mac App Store as downloads only.
When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey. After the volume is erased, you may 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 the volume has a different name, replace MyVolume in the command with the name of your volume. Each command assumes that the installer is 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 commands below into Terminal, then press Return to enter the command. Open Terminal, which is in the Utilities folder of your Applications folder. Plug in the USB flash drive or other volume that you're using for the bootable installer.
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