Do not download shady ISOs from random forums. Use the Terminal method above to convert Apple’s official Install macOS Big Sur.app into a pristine ISO. It takes 30 minutes, but you get a secure, bootable, 2021-perfect image that will work on VMware, VirtualBox, or a USB drive.
If you are running this ISO on a standard PC with 8GB-16GB RAM allocated: macos big sur iso 2021
softwareupdate --fetch-full-installer --full-installer-version 11.7.10 Direct Link: If the App Store fails, verified databases like Mr. Macintosh provide direct links to Apple’s servers for the InstallAssistant.pkg Apple Support 3. Create the ISO Image (Step-by-Step) Once "Install macOS Big Sur.app" is in your Applications folder, run these commands in Terminal one by one: Create a blank disk image: Do not download shady ISOs from random forums