Today, Apple released a small update to macOS Big Sur, numbered 11.2.1. Primarily, it fixes a problem affecting some MacBook Pro models that prevented their batteries from charging properly.

The update also fixed a sudo bug that could in some cases play a part in allowing an attacker to gain root access to the device, plus some other security-related updates.

Apple also released supplemental updates for Catalina 10.15.7 and Mojave 10.14.6 to address the same security issues.