Creating a bootable USB installer for macOS is an essential skill for any Mac user, IT professional, or system administrator. Whether you need to perform a clean installation on multiple machines, upgrade older Macs that no longer support the latest macOS version, or troubleshoot a system that won't boot, a bootable USB drive is your most reliable tool.
Once your bootable USB installer is successfully created using any of the methods above, follow these steps to boot your target Mac: Turn off the Mac completely. create mac os x bootable usb installer from dmg
The createinstallmedia command (Apple’s official tool) requires the .app bundle, not a raw DMG. If your DMG contains a .pkg installer, you must run the package first to extract the .app to your Applications folder. Creating a bootable USB installer for macOS is