9to5Mac published  a story that Apple has releases the first beta of macOS 10.15.6 to registered developers, as well a supplemental update for macOS 10.15.5.

Apple releases first beta of macOS 10.15.6, supplemental update for macOS 10.15.5 - 9to5Mac

Alongside the release of iOS 13.5.1 and iOS 13.5.5 today, Apple has also released a pair of new updates for macOS. For developers, Apple has released the first beta of macOS Catalina 10.15.6, while there is also a new supplemental update for all macOS Catalina 10.15.5. First, Apple says that the supplemental release of macOS …

Apple releases first beta of macOS 10.15.6, supplemental update for macOS 10.15.5 - 9to5Mac