How to Downgrade macOS Catalina to macOS Mojave

Facing issues due to bugs of macOS Catalina? It's a common issue when it's in beta mode! But don't worry anymore; we have a perfect guide to downgrade macOS Catalina to macOS Mojave! So let's get started!

Are you facing issues while using macOS Catalina? Fed up with certain bugs or any other feature you aren’t used to? Then why not get back to macOS Mojave? That’s the issue most of the new users might face when they install beta versions of macOS. That’s a common issue amongst the users, and we’re on the target to provide you the best solution.

To get rid of it, you need to downgrade from macOS Catalina to macOS Mojave. But let me tell you that macOS Catalina has stunning features and you would regret it later on for uninstalling it. Nevertheless, you can follow the guide to downgrade at any point in time.

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Before moving ahead, just make sure that you have the data backup of your current Mac device. Because once you get back from macOS Catalina to macOS Mojave, it will wipe out all the data that’s stored in your Mac. You can easily do it by using Time Machine (Head over to Apple MenuSystem Preferences Time Machine).

This setting will take you back from where you started (i.e., before you installed macOS Catalina). So if you have saved any file while using macOS Catalina, make sure you have a backup for the same, else, it will vanish once you’re back to macOS Mojave! And if you’re reading this piece of content on your Mac that you want to downgrade, save it somewhere else so that you can keep referring this page once you start the downgrade process.

How to Downgrade from macOS Catalina Beta to macOS Mojave

Although the process is the same for all Mac devices, the newer ones have an extra setting hiding in the startup security utility. Here’s what you need to do before you get started!

Got Newer MacBook After 2018? Get Started with This!

The T2 security chip comes with MacBook Pro, MacBook Air, and Mac Mini models (2018 or later). By default the booting of external media is disabled. And to downgrade to macOS Mojave from macOS Catalina, it’s important to enable this particular option for new MacBook users. Here’s how you can do it.

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Step #1. Restart your Mac and when you see () Apple Logo, hold down () Command + R.

Step #2. Now click on Utilities in the menu and then on Startup Security Utility.

Step #3.
Enter your admin details (the one which you used to set up Startup Security Utility). If you forget your credentials, do not proceed further.

Step #4.
Once done, in the External Boot section, click on Allow Booting from External Media.

This way, you’ll be able to pass the T2 chip’s security blocking by allowing external media to boot your Mac. Now let’s get started with the procedure of downgrading macOS Catalina to macOS Mojave.

#1. Take Backup!

It’s pretty easy to backup your Mac. Just make sure that you have your documents, files, pictures, etc produced or saved in macOS Catalina are safe in a hard drive. If you don’t have a hard drive, get yourself one from here! You can also try the cloud platforms to take your backup. Or if it’s too small or negligible, if just photos or videos, you can transfer it your iPhone as well.

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#2. Creating macOS Mojave Bootable Drive

Make sure you download macOS Mojave from the Mac App Store here. Once done, you need to keep the downloaded file in an external hard drive to use it later on for re-installation of macOS. If you aren’t aware of creating a bootable drive for macOS Mojave, check it out here to get started!

#3. Erase macOS Catalina from Your Mac

To erase macOS Catalina, follow the below-given process with care.

  1. Make sure that internet connectivity is good enough and is connected to your Mac.
  2. Click on Apple icon on the top left corner and select Restart from the drop-down menu.
  3. Now get your computer into recovery mode by holding () Command + R till the computer reboots. You need to do this right when you click on the Restart option.
  4. Once done, click on Disk Utility in OS X Utilities section and click on Continue.
  5. Next up, you need to select Startup Disk and then click on the Erase option.
  6. Enter the file name such as macOS Catalina or anything else that you want to erase and click on Erase again to complete the process.
  7. Once the process of erasing is done, you need to click on quit Disk Utility in the upper left corner from the drop-down menu. That’s it!

#4. Reinstall macOS Mojave from Bootable Hard Drive.

If you have already completed step #2 you have the bootable hard drive with you already.

  1. Connect your Mac to the internet via Wi-Fi or Ethernet.
  2. Plug-in the bootable hard drive into your Mac.
  3. Click on Apple icon from the top left corner → Restart from the drop-down menu.
  4. Now you need to press and hold the () Option key during the restart of your computer and that takes you to select a startup disk.
  5. Pick your bootable hard drive with macOS Mojave from the list of startup disk options. This will the start installation of macOS Mojave on your Mac.
  6. Now click on Continue and accept the terms and conditions.

This will now start installing macOS Mojave on your computer. Once done, you need to follow the final procedure before you complete the downgrade successfully.

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#5. Restore From Latest Backup Using Time Machine

Now that all the downgrade process is almost done, it’s time to restore everything from Time Machine on your Mac. Follow the below procedure to get started.

  1. Firstly, click on the Apple icon from the top left corner and choose Restart from the drop-down menu.
  2. Now, press and hold () Command+R and hold the keys until your computer reboots.
  3. Choose Restore from Time Machine Backup in the OS X Utilities and click on Continue.
  4. Choose the Backup source and hit on Continue.
  5. Next up, you need to choose the latest macOS Mojave backup from your computer.
  6. Now click on Continue once the backup source is selected.

This will start taking backup on your Mac device from the latest macOS Mojave that was saved in Time Machine in the past. So this is the overall process to downgrade macOS Catalina to macOS Mojave.

Summing Up…

I hope you won’t face any difficulties once you follow the above-mentioned guide to downgrade from macOS Catalina to macOS Mojave. But if you still face any issues during the overall process, you can comment below to get a quick response from our experts.

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Dhvanesh Adhiya
Dhvanesh Adhiya is the founder and editor-in-chief who takes care of audio, visual, and textual contents uploaded on He is passionate about wonderful apps that change the way your iPhone interacts in your life.
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