Apple has released a supplemental update to macOS Catalina 10.15.5, just a week after its release. In its release notes, Apple explained that the supplemental update is a simple security update.

Apple has released a supplemental update to macOS Catalina 10.15.5, just a week after its release. In its release notes, Apple explained that the supplemental update is a simple security update.
Apple is reportedly introducing a new feature for Mac notebooks called “Battery health management” in the upcoming macOS Catalina 10.15.5 release. The Verge reports that the feature is available for developers in the latest macOS developer preview release.
In a surprising move, Apple has opened its public beta program for iOS 13, iPadOS and macOS Catalina, just three weeks after unveiling the operating systems at WWDC19. Public betas are open to anyone (brave ones, naturally) who want to test early builds of OSes.