Apple does not officially distribute macOS Big Sur as an ISO file; they only provide it as an installer app through the Mac App Store. To get a functional ISO for a virtual machine or bootable media, you must first download the installer from Apple and then use Terminal to convert it. Phase 1: Download the Official Installer
Create the installation media:sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSur --nointeraction descargar macos big sur iso usa
Some third-party websites offer macOS Big Sur ISO downloads. However, we do not recommend using these websites, as they may provide outdated or modified versions of the operating system, which can pose security risks. Apple does not officially distribute macOS Big Sur
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