Apple today released a supplemental update for macOS Catalina 10.15.5, the fifth update to the macOS Catalina operating system that was released in October 2019. The supplemental update comes a week after the release of the macOS Catalina 10.15.5 update.
macOS Catalina 10.15.5 is a free update that can be downloaded from the Mac App Store using the Update feature in the System Preferences app. There’s also a security update for those running macOS High Sierra.
The first macOS Catalina 10.15.5 update introduced a new Battery Health Management feature designed to extend the overall lifespan of a Mac’s battery by reducing the rate of chemical aging. It also included controls to fine-tune the calibration of the Pro Display XDR and an option to control Automatic Prominence in a Group FaceTime call.
Read more at MacRumors.com