Backup is the key to downgrade since it ensures no data is lost while the downgrade is done. Hope, this blog helped you downgrade macOS Mojave to macOS high Sierra easily. Mac will restart once the installation is over. The process of installing High Sierra will begin.

From the Select boot disk window, choose the macOS High Sierra installer.

Restart the Mac and hold the Option Key.

Connect the USB drive with bootable macOS High Sierra installer.Reinstall macOS High Sierra by Using the Bootable Installer Wait till the Terminal displays Done, then quit Terminal.

When prompted to erase the drive, type Y then hit Return. Ensure it does not contain any valuable data copy the data if necessary to an external storage medium to avoid data loss. Plug in a USB drive (at least 16 GB) to your Mac.Go to Contents > Resources > createinstallmedia. Right click on it and select Show Package Contents. Go to Application folder to find the Install macOS High Sierra app. Open App Store, then download macOS High Sierra installer (which is around 5 GB).Read More: Recover Mac Data without Time Machine Backup 3rd Way-Create macOS High Sierra Bootable Installer then Reinstall macOS Follow the instructions to complete the restoration process of macOS High Sierra.Select the date and time from where you want to restore.Select Time Machine backup drive or Time Capsule then select “ Connect to Remote Disk”.On the “ macOS Utilities” window, choose “ Restore from Time Machine Backup”.Once the reinstallation process is over, your Mac will boot into macOS High Sierra.Ģnd Way-Use macOS High Sierra That You Backed Up with Time Machine Allow the Mac to perform a complete factory reset.Carry out the on-screen instructions to initiate the reinstallation process. On the “ macOS Utilities” window, click “ Reinstall macOS”.Release the keys when apple logo appears. Restart macOS Mojave 10.14 and instantly press and hold Command + R keys.Back up all the data from Mojave to an external SSD or HDD.1st Way-Use macOS High Sierra That Was Shipped with Your Mac The backup ensures you do not lose critical data due to complete drive erasure and subsequent installation of macOS High Sierra.

You may even require a USB drive of at least 16 GB.īefore downgrading macOS Mojave, you must back up all the data every single piece of your important files/folders to an external storage drive. Please note that you need to perform a few essential tasks in the downgrade process. Summary: If you are unhappy with the latest macOS Mojave 10.14 and wish to downgrade to macOS High Sierra 10.13, then follow this blog religiously.

How to clean install macos high sierra