A USB-C to USB-A adapter if you are flashing the drive on a modern MacBook. Method 1: The Native macOS Terminal Method (Recommended)
If you are dealing with very old versions of OS X (such as 10.7 Lion or 10.8 Mountain Lion) where the DMG contains a raw bootable file system layout ( BaseSystem.dmg ) rather than an installation app wrapper, you can restore the image directly using Disk Utility. Open and insert your USB drive.
The process takes 10–30 minutes.
Open (Press Cmd + Space , type "Disk Utility", and hit Enter).
To verify from Terminal:
: Ensure it is compatible with your target Mac model. Backup : The process will erase all data on the USB drive. Option 1: On a Mac (Official Method)
When warned that the drive will be erased, type Y and press Enter .
If the Mac boots directly to its internal drive or a folder with a question mark without showing the USB option:
sudo /Applications/Install\ macOS\ Ventura.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled create mac os x bootable usb installer from dmg
ls /Applications/ | grep "Install"
sudo /Applications/Install\ macOS\ Sonoma.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume Use code with caution.
Once the process completes, the USB drive will be a direct clone of the bootable installer disk image. Method 3: Creating the Mac USB on a Windows PC
Before diving into the methods, ensure you have all the necessary components to avoid interruptions: A USB-C to USB-A adapter if you are
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To help narrow down any potential bottlenecks,g., Lion, Yosemite, El Capitan) you are trying to install.
If you prefer a graphical user interface (GUI) or the terminal method fails, you can use a third-party tool like . Download and install BalenaEtcher. Open Etcher. Click Flash from file and select your DMG file. Click Select target and choose your USB drive. Click Flash! Step 4: Boot from the USB Installer