When finished, the Mac will reboot itself automatically and boot back into the MacOS version you restored to.
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Choose your Time Machine volume as the backup source then click Continue.After the drive has finished formatting, quit out of Disk Utility to return to the ‘macOS Utilities’ screen and now choose “Restore from Time Machine Backup”.Give the drive a new name and then select “Mac OS Extended (Journaled)” as the file system format, then click “Erase” – THIS DESTROYS ALL DATA ON THE DRIVE, DO NOT PROCEED WITHOUT A BACKUP.Choose the partition or hard drive with MacOS High Sierra installed on it, then choose the “Erase” button.At the “macOS Utilities” screen, choose “Disk Utility”.Reboot the Mac and hold down Command + R keys together to boot into Recovery Mode.Connect the Time Machine volume to the Mac if you have not done so already.Downgrading from MacOS High Sierra Betaīefore anything else, confirm that you have a Time Machine backup to restore to, and that you have a current backup of your important files and data. Failure to do so will result in permanent data loss. Do not proceed without having a backup of your files and data.
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Warning: You will be formatting and erasing the hard drive in this process, this will destroy all files and data on the drive. Do not proceed without a Time Machine backup you can use to restore.
Metaz macos high sierra install#
Important: If you do not have a Time Machine backup made from a prior install of MacOS Sierra or El Capitan, this approach will not work to downgrade because you will not have a Time Machine backup to restore from. Using a prior Time Machine backup offers the simplest way to downgrade MacOS High Sierra.
Metaz macos high sierra how to#
This tutorial will show you how to downgrade from MacOS High Sierra (10.13) beta back to MacOS Sierra (10.12.x) or OS X El Capitan (10.11.x) by using Time Machine to restore a previously made backup.