If you’re unhappy with the beta version of macOS Catalina and want to revert back to a previous stable release, the easiest way is to format your computer and restore from a Time Machine backup. ..
To use the Time Machine backup method we are discussing here, you must have created a Time Machine backup before installing macOS Catalina beta. The process is fairly straightforward, basically format and erase the MacOS Catalina drive and restore the Mac from a Time Machine backupup which was created before installing macOS Catalina.
This process will erase all data on the target Mac hard drive. Proceed with caution, as failure to have backups of your data could result in permanent loss of your data. ..
If you have not created a Time Machine backup from your previous macOS installation, you will need to do so before continuing with this guide.
If you don’t have a Time Machine backup that was created before installing MacOS Catalina, downgrade to 10.14.6 instead. This approach won’t work because you can’t downgrade to 10.15 if you don’t have a Time Machine backup that was created before installing MacOS Catalina.
How to Downgrading from macOS Catalina 10.15 Beta
If you don’t have a Time Machine backup before installing macOS Catalina, don’t continue with this approach. The downgrade method covered here depends on those Time Machine backups. ..
If you want to downgrade your Mac from macOS Catalina to the version of macOS you selected in your Time Machine backup, the restore process may take a while depending on the speed of the drives and the speed of your Mac. Let it finish as this is what you use to downgrade from macOS Catalina. ..
In Disk Utility, select the disk where macOS Catalina beta is currently installed, then click the ‘Erase’ button.
The drive to be erased soon is “Apple File System (APFS)” or “Mac OS Extended Journaled (HFS +)”
When you are satisfied with the drive and file system configuration, click “Erase” to format the Mac – THIS WILL DELETE ALL DATA ON THE DRIVE, make sure to back up of your data before proceeding!
Shut down the drive from the Apple menu.
At the MacOS Utilities screen, choose the option “Restore from Time Machine Backup” and then click on the “Backup” button.
You have selected the Time Machine drive as your backup source. To continue, you must click Continue.
If you want to revert to a previous version of macOS, choose “Select a backup” from the Time Machine screen and choose the backup from which you want to revert. Then, choose “Continue” from the confirmation dialog. ..
To start Time Machine backupup from macOS, select the destination drive name and click “Restore.”
After the backupup on the Mac, the Mac will automatically reboot and boot directly into the macOS version that was running when the selected Time Machine backupup was created. If the Time Machine backupup for example was from macOS Mojave, then macOS is Mojave to which macOS Catalina is downgraded.
Regardless of how you install macOS Catalina, the installation method doesn’t matter. All that matters is you have a Time Machine-backup in case you need to recover from the installation. ..
If you’re experiencing problems with your Mac, there are a few options available to you. You can try restoring your computer to its original settings using the restore option on the MacOS menu, or you can install a previous version of MacOS if you have one available. Each of these approaches still relies on having a backup of your files in case something goes wrong. ..
If you know of another way to downgrade from macOS Catalina beta, or if you have any tips, tricks, or experience doing it yourself, please share in the comments below! ..
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