Expected hash (if available from trusted sources) – (not official due to signing changes): e7a2c1b3f8d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8
: A secondary build (20D75) was released to address a bug where the installer failed to check for sufficient disk space before starting, which previously could result in a failed installation and required a clean reinstall. Security Patches macos big sur 1121 installer dmg