How to Downgrade MacOS Mojave to MacOS High Sierra – Easiest Way

Do you become bored of Macos Mojave? or you don’t like it while you are using? so don’t worry, in this article, I will guide you step by step with pictures to downgrade from MacOS Mojave to MacOS High Sierra. there are legions of Mac user who don’t have the idea of how to downgrade from Mojave to Sierra. as there are good bit methods to downgrade from MacOS Mojave and it is quite time consumers but you have to be patient and read this article attentively and follow each step one by one in order to not face with difficulties.

One good news is for you that the methodology I am going to apply is the best and handy but remember this method will work for any kind of Mac OS versions. you can apply the same method to downgrade from any other MacOS versions. ok, now let’s look toward downgrading from Mojave to High Sierra.

Related Articles:

How to Install MacOS Mojave on Virtualbox on Windows How to Install MacOS High Sierra on Virtualbox

Why do you need to Downgrade?

There can be a different reason but in my opinion, you have thought that MacOS Mojave might be the best operating system and you made up your mind to download and install it on your system or any guest Virtual Machine. while you started using Mojave and when time goes by you might dislike it because it works slowly and some of the applications might not work properly on the system. therefore, you are trying and looking for the method to downgrade from Mac OS Mojave to High Sierra. so, dear friends, don’t depress my article will help you to downgrade from Mojave to High Sierra.

Why Should I Downgrade to High Sierra?

Well, there are lots of good reason to use high sierra and as you know every operating system has it’s pros and cons but what I think MacOS high Sierra is the best Operating System. due to that, I prefer you to use high Sierra and one thing more if you want to downgrade from high sierra then you can do it. as people are searching how to downgrade MacOS High Sierra to El Capitan or how to downgrade from Macos High Sierra. 

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How to Downgrade MacOS Mojave to MacOS High Sierra

In below I will show you step by step on how to downgrade Mojave to high sierra. so, focus on each step and follow all of them perfectly. ok, let’s get started

Note: well, in order to downgrade your MacOS you will need to reformat your hard drive (it means you will lose your all data) so please backup all of your data before you begin. moreover, you will need an empty USB flash drive for this task.

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Step 1. in the first step, you will need to download the MacOS that you want to downgrade to. so, you can download it from the App Store just you need to click the Get button.

Download High Sierra

how to downgrade mojave to high sierra
Download MacOS High Sierra

Step 2. now in here click the download button to start the downloading and remember this step will take a while to complete the download.

how to downgrade mojave to high sierra
Click the Download

Step 3. if you get this error message then don’t worry just hit the Quit button because the system will not let you install the old version.

how to downgrade mojave to high sierra
Click Quit

Step 4. now we will need to create a bootable USB flash drive so, connect your USB to your computer and open Launchpad then go to other and finally go to Disk Utility.

how to downgrade mojave to high sierra
Open Disk Utility

Step 5. in here, you will see two option on the left side but you have to select the 16GB and click the Erase button.

how to downgrade mojave to high sierra
Erase File

Step 6. in here you have to give a proper a name and the name should be in lowercase. then for format select Mac OS Extended (Journaled) then click the Erase button.

how to downgrade mojave to high sierra
Give a Name

Step 7. while it is finished then click the Done button.

how to downgrade mojave to high sierra
Click Done

Step 8. now go to Launchpad then go to Other and open terminal.

how to downgrade mojave to high sierra
Open terminal

Step 9. now in Terminal copy and paste the following code that corresponds to Macos version that you are downgrading to. while you paste the code then press Enter key.

sudo /Applications/Install\ macOS\ High\ 
Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/boot --
applicationpath /Applications/Install\ macOS\ High\ Sierra.app
how to downgrade Macos Mojave to Macos High Sierra
Copy and Paste the Code

Step 10. it will ask you to enter your Password for your system and press Enter key.

how to downgrade Macos Mojave to Macos High Sierra
Enter password

Step 11. after waiting for a few seconds then it will ask you to press Y so press Y and press Enter key.

how to downgrade Macos Mojave to Macos High Sierra
Press Y

Step 12. so, here wait for a few seconds and while it is completed then Exit the Terminal.

Step 13. in this step, restart your computer and hold down Command + r on your keyboard while the computer boots up.

Step 14. well, you have to see this screenshot after holding Command + r if you didn’t see it then go back and restart it again and hold down Command + r to see this screenshot. so, here select your language and Continue. 

how to downgrade Macos Mojave to Macos High Sierra
Select language

Step 15. inside this screen select Disk utility and click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
Disk Utility

Step 16. now select Macintosh HD from the left side of the window and click Erase button.

how to downgrade Macos Mojave to Macos High Sierra
Erase Internal Mac Hard Drive

Step 17. in here check the name and make sure you have selected APFS format and click 

how to downgrade Macos Mojave to Macos High Sierra
Erase Macintosh HD

Step 18. once the process is completed, then restart your computer and hold down the option / Alt key while the computer boots up.

Step 19. if you have done everything properly then you will see the install window. install MacOS High Sierra, so press Enter button and wait for it.

how to downgrade Macos Mojave to Macos High Sierra
Install MacOS High Sierra

Step 20. Select your language and Click Continue 

how to downgrade Macos Mojave to Macos High Sierra
Select language

Step 21. in here accept the MacOS software license agreement by clicking the Agree button.

how to downgrade Macos Mojave to Macos High Sierra
Agree on the License

Step 22. in here select your Hard drive and click the Install MacOS.

how to downgrade Macos Mojave to Macos High Sierra
Install MacOS

Step 23. Ok, here select your country and click the Continue button.

How to Downgrade MacOS Mojave to MacOS High Sierra - Easiest Way
Select Country

Step 24. while you selected your country then choose the keyboard layout and click the continue button.

how to downgrade Macos Mojave to Macos High Sierra
Keyboard Layout

Step 25. in here select your internet and click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
Internet Connection

Step 26. it will as your about data and privacy so simply click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
Data and Privacy

Step 27. if you don’t want to transfer information to the Mac then select the last option and click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
transfer Information

Step 28. it will ask you to agree on the MacOS software license agreement so click the agree button.

how to downgrade Macos Mojave to Macos High Sierra
Software License

Step 29. in this step, provide your details as it is asking for computer account then click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
Account Details

Step 30. for express setup click the Continue button.

how to downgrade Macos Mojave to Macos High Sierra
Express Set

Step 31. congrats dear, you have downgraded from Mojave to High Sierra successfully. now enjoy the new Operating system on your computer.

how to downgrade Macos Mojave to Macos High Sierra
MacOS High Sierra

In Conclusion

In this article, you have learned how to downgrade Mac os Mojave to High Sierra, so here I show you the easiest method and the methodology I have guided you is the best and it will work with all MacOS versions. so try it once and if you get any kind of problems then feel free to ask me.

14 Comments
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  10. Tein says

    I’m using 2019 27″ model with 2TB Fusion Drive, while I go to Disk Utility and try to erase the hard drive, the the hold the system is ‘macOS Base System’ was dim and could not erase. How could I do? Thanks!

    1. Rehmat Qandol says

      To erase USB drive go to disk utility and from left side select the USB you want to erase, afterward, click the erase button from top.

  11. Tein says

    Thanks for the reply, the USB drive was set up to install the High Sierra. Therefore, it did not need to erase. I mean that the Fusion Drive that come with the iMac is need to erase but the button of erase is dim and it believe blocked to erase by Apple.

  12. Meyo says

    Hello,
    I tried to to every step as in this tutorial.
    But at the step 19 my macbook won’t boot the installation from the external hard drive.
    Would appreciate any suggestions.
    MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
    1.4 GHz Intel Core i5
    8 GB 2133 MHz LPDDR3
    Intel Iris Plus Graphics 645 1536 MB

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