Create Mac Os X Bootable Usb Installer From Dmg Jun 2026

Always use createinstallmedia when possible. Only use dd if you have a legacy bootable DMG (e.g., OS X Lion recovery disk).

Sometimes, the DMG you have is already a bootable image . This often happens with older macOS versions (Lion, Mountain Lion, Mavericks) or custom recovery DMGs. In this case, you don't need an installer app; you write the DMG directly to the USB. create mac os x bootable usb installer from dmg