You are facing problems while using macOS Catalina on your Mac. You are fed up with bugs or misbehaved features. Then, it’s time to get back to macOS Mojave.  It’s the problem that most of the new users face when installing MacOS beta version. So, that’s why I’m here to provide you the best solution.

To fix it, you’d better downgrade from MacOS Catalina version to MacOS Mojave. Before getting started, make sure to back up the data of your Mac first. Since when you return from macOS Catalina to macOS Mojave, the process will wipe out all the data stored in your Mac. You can make a backup by using Time Machine (in Apple Menu → System Preferences → Time Machine) on your Mac.

This setting will bring you back from where you started. So if there is any file saved in macOS Catalina, ensure to back up for the same, else, it might vanish when you back to macOS Mojave. You should save it on somewhere else so that you can keep referring this page after you start the downgrade process.

Downgrade from macOS Catalina Beta to macOS Mojave

While the process is the same for all Mac devices, the newer models have an extra setting in the startup utility. Here’s what you should know before getting started!

For Newer MacBook After 2018

The MacBook Pro, MacBook Air, and Mac Mini models (2018 or later) are equipped with the new T2 chip. By default, the booting of external media is turned off, so to downgrade to macOS Mojave from macOS Catalina, you need to enable this particular option. Here is how to do it

Step 1. Restart your Mac. When you see  Apple Logo, quickly hold down (⌘) Command + R keys

Step 2. Click on Utilities from the menu and then on Startup Security Utility.

Step 3.
 Enter your account and credentials (the one which you used to set up Startup Security Utility). If you forget them, you must not proceed further.

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

You can now pass the T2 chip’s security blocking, which allows the external media to boot up your Mac. Get started with the procedure of downgrading macOS Catalina to macOS Mojave version on your Mac.

Create a macOS Mojave Bootable Drive

First, you need to download macOS Mojave from the Mac App Store here. When done, keep the downloaded file in an external drive in order to use it later for the MacOS installation. Creating a bootable drive for macOS Mojave is not difficult, you can use the Install disk Creator app to do so (get it)

Erase macOS Catalina on Your Mac

To delete macOS Catalina, simply follow these steps below carefully.

  1. Make sure to connect your Mac to a stable Wi-Fi
  2. Click on Apple icon and then select Restart from the drop-down menu.
  3. Now boot it into recovery mode by holding(⌘) Command + R keys until the computer reboots. You must do this right when clicking on Restart
  4. When done, select Disk Utility in OS X Utilities section and click Continue.

6. ChooseStartup Disk and click on Erase

7. Enter the file name like macOS Catalina that you want to erase and select on Erase again to complete the process.

8. When you are done with erasing your Mac drive, click on quit Disk Utility in the left corner from the That’s it!

Reinstall macOS Mojave from Bootable Drive

After you formatted your hard drive and successfully created a bootable USB drive, you can now re-install MacOS Mojave on your device.

  1. Connect your Mac to the Internet through Wi-Fi or Ethernet.
  2. Plug the bootable hard drive into your Mac.
  3. Click on Apple icon from the left corner and select Restart from the menu.
  4. Press and hold the (⌥) Option key during the restart and you will be prompted to choose a startup disk.
  5. Select your bootable hard drive from the list of disk options and the installation of macOS Mojave on your Mac.
  6. Click on Continue, accept the terms and conditions and follow the rest of onscreen instructions.

It will start installing macOS Mojave on your computer. When the process is done, you just do the final procedure before completing the downgrade.

Also read: How To Install Windows 10 On MacOS Using BootCamp

Restore Your Data from Latest Backup with Time Machine

Once the downgrade process is done, it’s time to restore all your data using Time Machine on your Mac. Simply follow these steps to get started.

  1. Click on Apple icon from the left corner and select Restart from the drop-down menu.
  2. Press and hold (⌘) Command+R keys and hold them until your Mac reboots.
  3. Select Restore from Time Machine Backup and then click on
  4. Choose your Backup and click
  5. Select the latest macOS Mojave backup on your computer.
  6. Select Continue once the backup source is chosen.

The backup on your Mac device will be restored on the latest macOS Mojave version that was saved in Time Machine. That’s the overall process to downgrade macOS Catalina to macOS Mojave.


  1. When you say: “First, you need to download macOS Mojave from the Mac App Store here. ”
    Unfortunately the App Store download of Mojave immediately triggers Software Update which then informs me that “This copy of the “Install macOS” application is too old to be opened on this version of macOS.” Catch 22 ?

  2. I don’t have a pre-Catalina back-up. If I back up with Time Machine now, will that cause problems when I reinstall Mohave and restore everything from the back-up?


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