Apple does not distribute macOS as an ISO file. They distribute it as an application bundle ( Install macOS Big Sur.app ). Any ISO file you find on a forum or a file-sharing site has been created by a third party. Downloading a modified operating system image carries significant risks, from malware hidden in the system folders to corrupted installations that fail halfway through setup.
mv ~/Desktop/BigSur.cdr ~/Desktop/BigSur.iso big sur iso
The primary legitimate reasons include:
The Big Sur ISO is a powerful tool for Mac users, offering a convenient way to install or upgrade the operating system. While there are some challenges and limitations to be aware of, the benefits of using a Big Sur ISO make it a valuable resource for anyone looking to get the most out of their Mac. Apple does not distribute macOS as an ISO file
A Big Sur ISO is a disk image file that contains the installation files for macOS Big Sur. This file can be used to create a bootable USB drive or virtual machine, allowing users to install or run Big Sur on their Macs. A Big Sur ISO is a disk image
A quick search for "Big Sur ISO" will yield hundreds of results.
Burning the OS to a Blu-ray or creating a specialized bootable SD card.