Macos Big Sur Iso 2021 __top__ 【2026】

Wait 15-20 minutes. This erases the volume and copies boot files.

, requiring at least 8GB RAM and 60GB disk space. While Big Sur was the first to support Apple Silicon (M1 chips) and is now retired, security updates were issued into 2026. Are you setting this up for a Virtual Machine Bootable USB macos big sur iso 2021

: Some reviewers from Medium reported "performance bummers" and bugs in early 2021 releases, specifically regarding battery drain and UI lag. Wait 15-20 minutes