This is the modern solution. Tools like (free/open source) or UUByte DMG Editor (paid/trial) handle the heavy lifting.
Once your USB is created:
| Issue | Solution | |--------|----------| | Command not found | Check the .app name and path carefully – use Tab key for autocomplete | | "MyVolume" not found | Rename USB to exactly MyVolume (case-sensitive) or adjust the command | | DMG contains only a .pkg | Install the .pkg first, which places the .app into Applications | | .app is hidden in the DMG | Some DMGs have InstallESD.dmg – mount it and use Disk Utility's Restore feature instead | | Old macOS (Lion/Mountain Lion) | Use Disk Utility: drag InstallESD.dmg → select USB → click | create mac os x bootable usb installer from dmg
: At least 16GB of storage (32GB is safer for modern macOS versions). This is the modern solution
diskutil unmountDisk /dev/diskN
: Creating an installer can take 10–30 minutes. Method 1: Creating the Installer on a Mac (Recommended) diskutil unmountDisk /dev/diskN : Creating an installer can