My buddy, Steve Sande, has written about “How to Set Up macOS 10.15 Catalina in Parallels Desktop (and Why You May Want to Wait) here: Developers: How to Set Up macOS 10.15 Catalina in Parallels Desktop (and Why You May Want to Wait). But what if you’ve enrolled in the Software Beta Program and want out? No problem.
If you decide you don’t want to participate in the program anymore, here’s how you can “unenroll” your Mac.
Open Software Update in Systems Preferences.
Click the “Details” button below “This Mac is enrolled in the Apple Beta Software Program.”
A dialog will appear asking if you would like to restore your default update settings. Choose ‘Restore Defaults’, and your Mac will no longer receive public betas. When the next commercial version of macOS is released, you can install it from Software Update in System Preferences.
To go back to a prior release of macOS, you can restore your Mac from the Time Machine backup that you created before installing the public beta — assuming that you created such a back-up. And you did, didn’t you?
You can always sign up again later. As a member of the Apple Beta Software Program, you’ll be able to enroll your devices to access the public betas and try out the latest features. You can provide feedback directly to Apple using the Feedback Assistant app. The Apple Beta Software Program is free but remember: beta software is unfinished software, so use with care.