Macos Big Sur 11.5.1: (20g80)

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

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

: Apple stated they were aware of reports that this issue may have been actively exploited in the wild. While 11

: Resolved an issue where smart cards might not work correctly when logging into M1-based Macs. Installation & Compatibility Installation & Compatibility : Despite being a single-patch

: 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

Released on July 26, 2021, is a maintenance update primarily focused on a critical security patch. Key Update Details

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