Here's how to do it from text commands and using a purpose-built software called WizDMG. To create a bootable macOS installation disk, you have to burn the DMG file to a USB drive as CD/DVD is not available for Mac computers. It can also help in situations where the operating system is corrupted or installation from app store shows errors.
Rather than download and install a new OS from Apple's servers each time, it can be used for multiple installations on different machines.
You can now quit Terminal and eject the volume.Learning how to create a bootable macOS installation disk can be helpful in a variety of situations.
These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using.
You will create the bootable installer from this app, not from the disk image or. It installs an app named Install OS X El Capitan into your Applications folder.
Download using Safari, and open the disk image on a Mac that is compatible with OS X El Capitan.The installer for OS X El Capitan downloads to your Downloads folder as a disk image named InstallMacOSX.dmg. Enterprise administrators: Download from Apple, not a locally hosted software-update server.Download on a Mac that is using macOS Sierra 10.12.5 or later, or OS X El Capitan 10.11.6.Download on a Mac that is compatible with that version of macOS.If the installer opens after downloading, quit it without continuing installation. The installer for macOS Monterey, macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra downloads to your Applications folder as an app named Install macOS.