The output file usually ends in .cdr . Virtualization software often prefers the .iso extension.

| Version | Download method | |--------|----------------| | Sonoma 14 | App Store on Mac | | Ventura 13 | App Store | | Monterey 12 | Apple Support page | | Big Sur 11 | Apple Support page |

Use the createinstallmedia tool found inside the downloaded .app file to copy files to the mounted volume.

A: With patches and specific kernels (e.g., AMD Vanilla), yes, but it’s difficult. Intel CPUs are strongly recommended.

hdiutil attach /tmp/MacOS.dmg -noverify -mountpoint /Volumes/macOS