Apple has published macOS Big Sur 11.6.6 and macOS Catalina 10.15.7 security upgrades, offering tiny changes to the last-generation Mac operating systems that are likely focused on security patches and under-the-hood enhancements.
The macOS Big Sur 11.6.6 upgrade arrived alongside Apple’s current software release schedule, which includes macOS Monterey 12.4 and iOS 15.5.
It’s unclear what exact fixes or upgrades are included in macOS 11.6.6 or macOS 10.15.7, but they’re probably small and won’t affect users.
With the release of macOS Big Sur 11.6.5 in March, Apple patched a number of security issues in the operating system. Apple has previously upgraded the macOS Big Sur platform with macOS 11.6.4 in February.
On Monday, the macOS Monterey 12.4 update included small under-the-hood changes and bug fixes.
In November 2020, Apple introduced macOS Big Sur for the first time. The Mac operating system had a number of substantial updates, including a redesigned user interface and support for Apple Silicon.