Big Sur OS Big Sur OS Preparation Uninstall previous UNLOCKER Download Unlocker 3.0.3 ( github ) Run win-uninstall.cmd as Admin UNINSTAL previous VMware Uninstal through Control Panel Then use this script ( github ) Uninstal Creating clean ISO file ( reddit ) On your existing Mac system, download Mojave from the App Store. How to: Open App Store Search for "Big Sur" Click "Get" After Download is finished Right-click and "Quit" the installer from the Dock Now you should have Big Sur installer in your Application folder Create temporary .DMG file hdiutil create -o /tmp/BigSur -size 13000m -layout SPUD -fs HFS+J Mount it hdiutil attach /tmp/BigSur.dmg -noverify -mountpoint /Volumes/install_build Go to Desktop and rename the mounted drive from "untitled" to e.g.: "BigSur" Drop the installer into .dmg sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSur Eject the mounted drive. S...
