: Available for all Macs compatible with Big Sur, including MacBook (2015+), MacBook Air (2013+), and iMac (2014+).
: Apple stated they were aware of reports that this issue may have been actively exploited in the wild.
: Users typically install this by going to System Preferences > Software Update . macOS Big Sur 11.5.1 (20G80)
: Resolved an issue where smart cards might not work correctly when logging into M1-based Macs. Installation & Compatibility
: 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 : Available for all Macs compatible with Big
: An application could potentially execute arbitrary code with kernel privileges.
: This was a "surprise" security patch released just five days after version 11.5. : Resolved an issue where smart cards might
: 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
