The macOS 10.15 Catalina Public Beta is now available after shord testing period. As always, Apple wants users to test macOS Catalina to provide constructive feedback, report issues etc.. before the official release later this year. To participate in the free Public Beta, you must enroll in the Apple Beta Software Program using your Apple ID.
Enroll in the Free Apple Beta Software Program https://beta.apple.com/sp/betaprogram/welcome
Also, please take a look at our macOS Catalina forum posts:
Enjoy :) :)
