Macos Big Sur 11.5.1 - (20g80)

: Users typically install this by going to System Preferences > Software Update .

: Apple stated they were aware of reports that this issue may have been actively exploited in the wild.

While 11.5.1 was security-focused, it carries over the bug fixes introduced in 11.5 (20G71), including: macOS Big Sur 11.5.1 (20G80)

: This was a "surprise" security patch released just five days after version 11.5.

: Resolved an issue where smart cards might not work correctly when logging into M1-based Macs. Installation & Compatibility : Users typically install this by going to

: An application could potentially execute arbitrary code with kernel privileges.

: This security fix was released simultaneously with iOS 14.7.1 and iPadOS 14.7.1 to address the same vulnerability. macOS 11.5.1 - Apple Wiki | Fandom : Resolved an issue where smart cards might

: Despite being a single-patch update, the download size was approximately 2.2 GB for Intel Macs and over 3.1 GB for M1 Macs . Improvements from the 11.5 Branch