After the latest WWDC event, that is the first Public Beta to seem on macOS in Catalina model 10.15 for anybody to down load and use.
To register to use Public Beta for macOS:
- Go to this link: https://beta.apple.com/sp/betaprogram/ (If the link cannot be reached, wait a moment, maybe the Apple server is overcrowded).
- Log in to your Apple ID
- Select the macOS tab
- Then select Download the macOS Public Beta Access Utility
List of devices supporting macOS Catalina:
- MacBook (12 “) 2015 or later
- MacBook Air 2012 and above
- MacBook Pro 2012 and above
- Mac Mini 2012 and above
- Mac 2012 and above
- iMac Pro 2017 (all models)
- Mac Pro 2013 or later