Type the following command (replace [Name] with the actual name of your installer, e.g., Sonoma , Ventura , Monterey ):
sudo /Applications/Install\ macOS\ [Version\ Name].app/Contents/Resources/createinstallmedia --volume /Volumes/USB
Click . Disk Utility will block-copy the contents of the disk image directly onto the USB drive. Method 3: Creating the Bootable USB on Windows
Click and click the checkbox next to your USB drive. Click Flash! to begin writing. create mac os x bootable usb installer from dmg
Many official OS X DMGs contain a nested .app package rather than raw bootable sector images. We need to mount the DMG to access the underlying installer application.
sync sudo diskutil eject /dev/diskX
Tell you are compatible with the createinstallmedia command. Type the following command (replace [Name] with the
For macOS installers downloaded from the App Store, Apple provides a dedicated tool called createinstallmedia . This method is Apple‑sanctioned and designed specifically for creating bootable macOS installation media.
Install dmg2img via your package manager (e.g., sudo apt install dmg2img ). Convert the DMG file to an ISO image: dmg2img /path/to/installer.dmg /path/to/installer.iso Use code with caution.
diskutil unmountDisk /dev/diskX
Identify your USB drive's identifier using lsblk (e.g., /dev/sdb ). Unmount the USB drive: sudo umount /dev/sdb* Flash the converted image using dd :
Before attempting to create your bootable drive, ensure you have the following components ready:
You will need administrator or root access on whatever operating system you choose to use. 💻 Method 1: Creating the Bootable USB on macOS Click Flash
Creating a bootable macOS USB installer from a DMG file depends on whether you are using a Mac or a Windows PC. On a Mac, the standard method involves extracting the "Install macOS" app from the DMG and using the native createinstallmedia