| Format | Purpose | Structure | |--------|---------|------------| | | Installer package (flat file or bundle) | Payload + Bom + Scripts; compressed or signed | | .iso | Optical disc image (sector-by-sector) | File system (ISO 9660/UDF) + bootable El Torito |

This guide breaks down the three most common scenarios for converting PKG to ISO based on where your file came from.

⚠️ createinstallmedia erases the target volume and makes it bootable.