As confirmed by official Apple support discussions, Instead, Apple provides a full installer application ( Install macOS Big Sur.app ), which you would normally download from the Mac App Store. This official installer is designed for upgrading or installing directly on Apple hardware, not for virtual machines.
hdiutil convert /tmp/BigSur.dmg -format UDTO -o /tmp/BigSur.cdr Use code with caution. Step 8: Rename and Relocate the ISO macos big sur iso 2021
Use the built-in createinstallmedia tool embedded inside the Apple installation file to flash the installation files onto your temporary disk image. You will be prompted to enter your Mac’s administrator password. As confirmed by official Apple support discussions, Instead,
Download the full installer for macOS Big Sur directly on a compatible Mac. macos big sur iso 2021