Macos: Big Sur Iso 2021 //free\\

Alternatively, if you have a legitimate copy from 2021:

If you have access to a working Mac, this is the safest method.

Choose the macOS Big Sur ISO file as the virtual optical drive. macos big sur iso 2021

Mount the newly created disk image to your filesystem so you can write to it:

Pre-compiled images may lack critical security patches released later in 2021 and beyond. Alternatively, if you have a legitimate copy from

Comprehensive Guide to macOS Big Sur ISO (2021) macOS Big Sur (version 11) represents one of Apple's most significant operating system updates, introducing a complete visual redesign and native support for Apple Silicon. Many developers, system administrators, and virtualization enthusiasts search for the to run the operating system in virtual machines like VMware, VirtualBox, or on non-Apple hardware.

sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSurInstaller --nointeraction Use code with caution. Comprehensive Guide to macOS Big Sur ISO (2021)

At least 30 GB of free storage space on your hard drive to accommodate both the installer app and the temporary disk images.