Download extract-xiso . (On Linux: sudo apt install extract-xiso . On Windows: download the .exe from the Xbox Dev scene).
Run the conversion command:
Open a terminal/command prompt in the folder containing your standard ISO.
Download Qwix (version 1.31 or newer).
Select "ISO to XISO" .
XISO is not the same as a standard ISO. A standard ISO contains a file system (usually UDF or ISO9660). An XISO contains a raw Xbox file system (Xbox FATX) and includes a special "default.xbe" executable header. If you try to burn a standard ISO to a DVD for an original Xbox, it will not boot. Method 1: Using extract-xiso (Best for Linux/Mac/Windows CLI) This is the most reliable open-source tool.