hdiutil convert ~/Desktop/BigSur.dmg -format UDTO -o ~/Desktop/BigSur.iso
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSur --nointeraction macos big sur iso 2021
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSur --nointeraction Use code with caution. Copied to clipboard hdiutil convert ~/Desktop/BigSur
That said, I’ll provide a of the concept and reality of using a “macOS Big Sur ISO” in 2021 — looking at authenticity, performance, security risks, use cases, and how it compares to official methods. macos big sur iso 2021
To create an ISO, you must first have the official "Install macOS Big Sur.app" from Apple. macOS Big Sur - Technical Specifications - Apple Support
Apple officially distributes macOS through the App Store as a .app bundle. However, advanced users, IT administrators, and virtual machine enthusiasts often require a for: