Macos Big Sur 11.5.1 (20g80) ✧

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

: Addresses a serious vulnerability in the IOMobileFrameBuffer . macOS Big Sur 11.5.1 (20G80)

: Fixed an issue where the play count or last played date might not update in the library. : This was a "surprise" security patch released

: Resolved an issue where smart cards might not work correctly when logging into M1-based Macs. Installation & Compatibility including MacBook (2015+)

: Available for all Macs compatible with Big Sur, including MacBook (2015+), MacBook Air (2013+), and iMac (2014+).

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