. While its visual overhaul was highly praised, users in 2021 also faced some stability and compatibility hurdles. Core Highlights (2021 Perspective)
Always create your own macOS Big Sur ISO from Apple’s official installer. macos big sur iso 2021
Wait 15-20 minutes. This erases the volume and copies boot files. macos big sur iso 2021
Because you are using a specific 2021 build, you might encounter these issues: macos big sur iso 2021
Rename the resulting .cdr file to .iso .