macos big sur

Discussions on WindowsForum.com about macOS Big Sur focus on the distinction between security updates and certificate renewals for older Apple operating systems. In February 2026, Apple released macOS Big Sur 11.7.11 and a Catalina security update, but these were not a return to regular security support. Instead, they renewed certificates required for services like iMessage, FaceTime, and Mac activation to continue functioning after January 2027. Apple's security-release index lists no published CVE entries for these updates, and independent reporting from sources like TidBITS and Heise Online clarifies that they are not security fixes. This tag covers user discussions clarifying the nature of these updates and their implications for legacy macOS users.