DOWNGRADE MAC OS SIERRA WITHOUT ERASING HOW TO
DOWNGRADE MAC OS SIERRA WITHOUT ERASING SOFTWARE

Again at the MacOS Utilities screen, now choose the “Restore from Time Machine Backup” option.

Once the drive has erased and formatted, quit from Disk Utility.

When satisfied with the drive and file system configuration, click “Erase” to format the Mac – THIS ERASES ALL DATA ON THE DRIVE, be certain you have a backup of your data before proceeding!.

Give the soon to be erased drive a name, then select the file system format as either “Apple File System (APFS)” (for most MacOS Mojave Macs) or “Mac OS Extended Journaled (HFS+)” (for most Sierra or older Mac releases).

From within Disk Utility, select the disk with macOS Catalina beta currently installed on it, then click the “Erase” button.

From the “macOS Utilities” screen, choose “Disk Utility”.

Immediately upon reboot, hold down Command + R keys to boot the Mac into Recovery Mode.

Connect the Time Machine drive to the Mac, this should be the Time Machine backup drive that contains the prior macOS system backup as that is what you’ll be restoring from.

The downgrade method covered here depends on those Time Machine backups.

DOWNGRADE MAC OS SIERRA WITHOUT ERASING HOW TO

How to Downgrade from macOS Catalina 10.15 BetaĪgain, if you do not have a Time Machine backup made from before installing macOS Catalina, do not proceed with this approach.

DOWNGRADE MAC OS SIERRA WITHOUT ERASING SOFTWARE

You can attempt to reinstall only system software using Internet Recovery, but early reports indicate that does not work for downgrading from Catalina 10.15. Instead, you’ll likely need to format the drive and perform a clean install. If you do not have a Time Machine backup that was made prior to installing MacOS Catalina then this approach for downgrading will not work.

If you do not have a Time Machine backup from your prior MacOS installation, do not proceed with this method. made from the MacOS release prior to installing MacOS Catalina beta), as that is what you will be restoring the Mac from. You will also want to manually save or backup any important files or data that was created under macOS Catalina as that data will not be restored from the prior Time Machine backup.īefore getting started it’s a good idea to confirm that you have a Time Machine backup which was made from the prior MacOS installation (i.e. Failure to have adequate backups of your data will result in permanent data loss from erasing and formatting the drive. Warning: This process will erase the target Mac hard drive of all data, do not proceed without adequate backups of your data. The process is fairly straight forward, basically you’ll format and erase the MacOS Catalina drive and then restore the Mac with a Time Machine backup made prior to installing MacOS Catalina. To use the method for downgrading from MacOS Catalina beta that we discuss here you will be required to have made a Time Machine backup prior to installing MacOS Catalina beta, because it is that Time Machine backup you will be restoring from. This is the easiest method for reverting from MacOS Catalina beta back down to a prior MacOS release.

The simplest way to downgrade from MacOS Catalina beta back to a prior stable build of MacOS like MacOS Mojave, High Sierra, Sierra, El Capitan, or otherwise, is by formatting the computer and then restoring from a Time Machine backup made prior to installing MacOS Catalina beta. Have you decided you no longer want to run the MacOS Catalina 10.15 beta? You can revert from MacOS Catalina by downgrading.

Downgrade mac os sierra without erasing