The Following steps you should have to follow it:-
Step 1. First start your Mac and open Software Updates on your Mac.
Step 2. Then you have to go to the System Settings > General > Software Updates and you will get the following instructions about new update and what is updating in your new software.
Step 3. You should see two options of Automatic Updates and Beta Updates.
Step 4. Click on the i beside Beta Updates.
Step 5. You can now turn on Beta Updates if they weren’t already on.
Step 6. Choose the beta which you want to download.
Step 7. If your developer account is tied to a different Apple ID to your usual one you can change that here.
Step 8. Click Done.
Step 9. Now your Mac will Check for updates and eventually show the Sonoma Developer Beta as an upgrade.
Step 10. Click on Upgrade Now.
Step 11. If you were already running an earlier macOS Public Beta you’ll find the new macOS beta as an upgrade via Software Update.
Step 12. Just click on Upgrade Now.
Step 13. You may have to update to the latest version of your current beta before you can do so, if not follow the steps below to get the beta access utility.
Step 14. If you are enrolled in the Developer Program, go to Apple’s beta download page.
Step 15. Click on Install Profile to download the new macOS Developer Beta Access Utility to your Mac.
Step 16. If you are enrolled as a public beta tester, download the macOS Public Beta Access Utility.
Step 17. Go to Downloads on your Mac and click on the macOS Beta Access Utility to open it.
Step 18. Double-click on the dmg file and the installer will run.
Step 19. Once the new macOS beta is installed Software Update will check to see if there are any updates.
Step 20. Click Update and the latest version will download.
Step 21. You’ll see a prompt to install the latest macOS beta.
Step 22. Click on Continue.
Step 23. Agree to the Terms & Conditions.
Step 24. Click on Install.
The Guidelines of MacOS Public Sonoma Beta Future Updates:-
1. Once you are running the beta the updates will come through to your Mac automatically.
2. You just need to click to install.
3. You will receive a notification when the next update to the beta is available.
4. Updates will be available via Software Update in System Settings/System Preferences.
Is the MacOS Public beta stable?
1. By its nature, a beta has the potential to be unstable it will create problems.
2. Therefore it’s not advised that you install it on a Mac that you rely on.
3. If you have a second Mac that isn’t mission-critical then install it there.
4. We strongly recommend that you don’t risk all by putting the MacOS beta on your primary MacOS, especially not in the early days of the beta development because we are still working on the betas version if their is not any glitch or bugs which create problems so try to wait sometime after launching new software when the 2 to 3 weeks go then you try it but its your responsibility we not recommend it.
5. If you don’t have a second Mac there are a couple of ways you could run MacOS beta on your Mac without running the risk of losing data or finding your Mac stops working:
6. We recommend installing it on a partition which these days is really a volume and is much easier to create than a partition .
7. Read about how to do that here how to dual-boot Mac run two versions of MacOS on a Mac.
8. Alternatively, you could install the macOS beta on an external drive and run it on that.
9. We discuss the safety of the macOS beta and the risks you might be taking in more detail read it.
10. If the stability of the beta worries you then you are probably better off waiting until the final version is out, or at least waiting until testing has been happening for a few months before getting the beta.
