This is the downside of using a 2021 ISO in the current day:
It’s important to clarify upfront: The company provides macOS installers as .app bundles (via the Mac App Store) or as .dmg / .pkg files. Any “macOS Big Sur ISO” you find online (2021 or otherwise) is almost certainly a third-party creation — often intended for use in virtual machines (like VMware or VirtualBox on non-Apple hardware) or for bootable USB creation on Windows.
Creating a is a robust way to ensure you have a portable, bootable version of the OS for testing, virtualization, or repair. By using the official createinstallmedia tool within macOS, you guarantee that the image is legitimate and stable. If you have any trouble, let me know if: You are trying to create a USB or a VM? What is your host machine (Mac or Windows)? Are you getting a specific error in Terminal?
marked a historic turning point for Apple’s desktop operating system. Released in late 2020 and refined throughout 2021, Big Sur wasn’t just an update—it was a complete reimagining of the Mac experience. For users seeking the macOS Big Sur ISO from 2021, this document provides everything you need: what it is, why it matters, and how to use it effectively. macos big sur iso 2021
Downloading macOS Big Sur ISO 2021 is relatively straightforward, but it does require some technical knowledge and caution. Here are the steps to download macOS Big Sur ISO 2021:
Running Big Sur on Windows 10/11 using VMware Workstation or VirtualBox.
8/10 (Still the king of performance-per-watt in VMs). Score as a Daily OS (2024): 5/10 (Outdated security and app support). This is the downside of using a 2021
Open the Terminal app and use the following commands. (Note: This process requires administrative privileges).
Download and install VMware Workstation Pro (Note: As of late 2024, VMware Workstation Pro is free for personal use ).
Popular and reliable platforms hosting the 2021 macOS Big Sur ISO include: By using the official createinstallmedia tool within macOS,
What are you currently using? (Windows, Linux, or macOS?)
Use a tool like Auto-Unlocker to allow "Apple Mac OS X" as a guest operating system option.