Macos Big Sur Iso 2021 Jun 2026

Wait for the download to complete. Once finished, a file named Install macOS Big Sur.app will appear in your folder. Step 2: Create a Blank Disk Image

Unlike standard update packages downloaded directly from the Mac App Store, an ISO file is a universal disk image. It encapsulates the entire operating system installer into a single, uncompressed file that can be read across different platforms.

Use the built-in createinstallmedia tool embedded inside the Apple installation file to flash the installation files onto your temporary disk image. You will be prompted to enter your Mac’s administrator password. macos big sur iso 2021

Under , click the empty optical drive icon under the Controller: SATA section.

: Unofficial uploads may suffer from data corruption, leading to random kernel panics during installation. Wait for the download to complete

Ensure the "Enable EFI (special OSes only)" option is checked in your VM settings.

Need help booting your ISO? Leave a comment below (or check r/macOSVMs on Reddit for archived 2021 threads). It encapsulates the entire operating system installer into

Big Sur was the biggest visual overhaul of macOS since OS X 10.10 Yosemite.

Improved compatibility for Apple Silicon, fixing smart card login issues in 11.5.

Click to pull down the installer via the Software Update panel.