sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume Replace /Applications/Install\ macOS\ Big\ Sur.app with the path to your installer and /Volumes/MyVolume with the path to your USB drive. For the most reliable and secure experience, it's recommended to obtain macOS updates directly from Apple or through the Mac App Store. If you're looking for a specific version like macOS Big Sur 11.2.2, ensure you're getting it from a legitimate source to avoid any potential security risks. Young Marcus Expanded Ongoing Version 010 Updated Apr 2026