Apple

How to Downgrade macOS Mojave to macOS High Sierra

If you downloaded macOS Mojave and now you do not like it for any reason, you can downgrade it to macOS High Sierra. This article guides you on how to downgrade from macOS Mojave to macOS High Sierra.

Downgrade macOS Mojave to macOS High Sierra

It is necessary that you should back up your Mac before you start this. If you use iCloud Drive to store documents or folders, ensure that it syncs properly. Here are the ways to downgrade from macOS Mojave to macOS High Sierra:

downgrade macos mojave to macos

Back up your Mac

It is necessary to back up your Mac before you start the procedure of downgrading. You can back up your Mac with Time Machine, an external hard drive, a cloud service like iCloud or Dropbox. Some files that you use or work on, since you installed Mojave may not be up to date on that backup. It is necessary to copy those files to an external disk or a cloud storage service such as iCloud Drive or Dropbox or an app such as Get Backup Pro.

  • Follow the given below steps to back up your Mac with Apple’s own Time Machine:
    • You need to go to the Time Machine and then choose Disk.
    • Then select where you need to save your files such as to the external drive or to the cloud storage.
    • Then tap On to turn Time Machine on.
    • You need to tap on the arrow clock icon and choose Back Up Now in the menu bar at the top of the screen.
    • Follow the given below steps to back up your Mac with an app Get Backup Pro:
    • You need to tap the plus (+) button at the bottom of the project list and then name the project.
    • Then select a backup destination and choose whether you need to store original files and folders or keep them inside the disk image.
    • Then drag and drop files and folders to the list in the main window and then tap Start.

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Make notes

  • If you perform the process of downgrading, it deletes everything from your hard drive including passwords, license keys, and settings.
  • You can get your data back to your Mac when you created a backup of your Mac before starting the process of downgrading.
  • It is better that you should make a note of all the passwords, settings, license keys and other data that you need.
  • You can utilize the password manager that syncs with other devices to store all the data that you need.
  • You can also use any cloud-based note-taking tool to make notes.
  • You can also take screenshots of settings that make your work easier.

Erase Mojave

When you back up the files that you will need after downgrading and create the bootable installer, you can erase Mojave. Follow the given below steps to erase Mojave:

erase mojave

  • You ensure that your Mac connects to the internet.
  • The tap on the Apple menu and select Restart.
  • Then hold down Command+Option+Shift+R to boot into recovery mode.
  • Then tap on Disk Utility in the macOS utility window.
  • Then you need to choose the disk with Mojave on it.
  • Then select Erase.
  • You need to provide a name to the disk. Then select Mac OS Extended or APFS as the file format.
  • Then tap Erase.
  • Then you need to quit Disk Utility. 

Ways to downgrade from OSX Catalina to macOS Mojave?

First of all, you need to erase your startup disk as mentioned above because Recovery mode does not install an older version of the OS on top of a newer version. Follow the given below steps to downgrade from macOS Mojave:

  • You need to select Reinstall macOS from macOS Utilities
  • Then enter Continue.Reinstall macOS from macOS Utilities

Downgrade from a Time Machine backup

If you have a backup of your Mac before the installation of Mojave, you can use Time Machine to reinstall High Sierra. It is important that your Time Machine disk connects to your Mac either directly or through a network before you start the process. Follow the given below steps to downgrade from a Time Machine backup:

  • Firstly you need to erase your startup disk.
  • Then select Restore from Time Machine Backup in the macOS Utilities window.
  • If you have a backup on an external disk, you need to choose it. If you have a backup on a network disk, you need to choose it and select Connect to Remote Disk.
  • Then enter your name and password for the disk if required.
  • You need to choose the date and time of the backup you need to restore to.
  • Then you need to follow the on-screen instructions.

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Make macOS High Sierra Bootable Installer then Reinstall macOS

Follow the given below steps :

  • You need to go to the App Store and then download the macOS High Sierra installer.
  • Then quit the installer when it opens. Then open the Application folder to search the Install macOS High Sierra app.
  • Then right-click on the app and then choose Show Package Contents. Then open Contents then Resources and then createin stall media.
  • You need to connect a USB drive to your Mac. It is necessary that it does not have any valuable data. Then you can copy the data if required to an external storage medium to avoid data loss.
  • Then go to Applications then Utilities. You need to double-click the Terminal to open the app.
  • Then you need to type the command as:

Sudo <drag and drop the create install media icon to add its path> – –volume <drag and drop the USB drive from Desktop to add its path>

  • Then hit Return. You need to type the Admin Password. If prompts to erase the drive, you need to type Y and then hit Return.
  • Then quit Terminal when the Terminal displays Done.

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Reinstall macOS High Sierra by Using the Bootable Installer:

Follow the given below steps:

  • You need to plug in a USB drive with a bootable macOS High Sierra installer.
  • Then restart the Mac and hold the Option Key.
  • And then you need to select the macOS High Sierra installer from the Select boot disk window.
  • Then the process of installing the High Sierra starts. Mac restarts when the installation is done. 

Reinstall High Sierra

Follow the given below steps:

Reinstall High Sierra

  • You need to open the Apple menu and then select Restart and hold down the Option key.
  • If you view the option to select a boot disk, you need to select the installer disk you just create.
  • Then High Sierra starts installing on your Mac.
  • When the installation completes, your Mac restart and you can view the Startup Assistant.
  • Then you can go through the steps to set up your Mac.

Restore your Mac settings from a backup

You can restore your backup files and settings from your Get Backup Pro hard drive or through Time Machine. If the Time Machine placed on your system before the downgrade of your macOS, you can recover files in Recovery Mode. Follow the given below steps to restore your Mac settings from a backup:

  • It is necessary to connect your Mac to the internet and then restart the system.
  • You need to hold Command+R as your system reboots to start Recovery Mode.
  • Then choose Restore from Time Machine Backup and then tap Continue.
  • You need to select your backup source and then tap Continue.
  • Then choose your backup and then tap Continue.

The re-installation of the macOS High Sierra is a simple process. But it is necessary that before proceeding you backup your system with the Time Machine, an external hard drive, a cloud service such as iCloud or Dropbox or a reliable app such as Get Backup Pro. You can easily downgrade from macOS Mojave to macOS high sierra from the above-mentioned methods. You need to follow each step carefully and must enter the commands properly.

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