Sunday, October 2

How to Downgrade your Mac to Catalina from Big Sur

Many Mac owners have left Big Sur behind because Monterey is the newest version of macOS. Alternatively, if your machine isn’t one of the Macs that supports the Monterey operating system, and then you may want to consider Big Sur.  Although Big Sur is recommended in most cases, there are still some cases in which you may want to downgrade macOS to Catalina. This article will further tell you, how you can handle the situation if these consequences occur to you.

However, before you downgrade to Catalina, try Mac Optimizer Pro first, if your Mac is experiencing performance issues. There are a variety of security, optimization, and cleaning tools available in this best Mac cleaner and optimizer, which may be causing your problems. Each tool comes with a free fix. Download it now. That may be exactly what you need.  

How do you know when to downgrade Big Sur to Catalina?

macOS users should always use the most recent version available. Furthermore, you’ll get Apple’s security updates for a longer period, as well as the latest features and apps. In the end, older Macs and operating systems will no longer be supported. Malware could take advantage of that vulnerability. Furthermore, you can also utilize the Mac optimizer Pro tool to tackle unnecessary caches and junk files. With proper optimization, the Catalina will work pretty well

However, there are times when downgrading to an older version of macOS like Catalina might be a good idea:

For fixing problems:

Considering Big Sur has been around for a while, you should be able to run it on your Mac without any problems. Nevertheless, downgrading may solve your problems with Big Sur if you still have them.

For the purpose of running old hardware or software: 

Depending on whether old peripherals and apps no longer work on Big Sur, you can downgrade to Catalina and fix them.

Due to performance issues:

The upgrade to Big Sur shouldn’t cause any speed problems. But, if it does, you can go back to Catalina.

Make backups of your data

If you’re planning to downgrade from Big Sur to Catalina, make sure you back up all your data first. As long as you are happy to lose everything on your Mac, then you shouldn’t worry about it.

Backing up your Mac’s data can be done through four different methods:

  • Copy files manually to a USB drive or other external drive
  • Back up with Time Machine
  • Clone the entire hard drive of your Mac
  • Save significant files to your iCloud

Getting Big Sur downgraded

As soon as you’ve secured any crucial data, there are several ways to get back to Catalina from Big Sur. In the first case, you use macOS’s built-in Time Machine feature, while in the second case you create a bootable USB drive.  

Downgrade Big Sur with Time Machine

There’s good news if you’ve made a Time Machine backup of your Mac. You can restore it to Catalina using that backup. Simple as that!

Delete your Mac’s system disk

If you want to go back to Catalina using Time Machine, you must erase all data from your main system drive first.  

You can easily erase your Mac by following these steps:

  1. First, you need to format and erase your Mac. Shut it down first. 
  2. When it restarts, hold down Command + R while it starts up again
  3. Here you’ll find macOS Utilities. Click on Disk Utility
  4. Click Continue, and then choose Startup Disk
  5. Next, select APFS as the file format and click Erase
  6. In the final step, select GUID Partition Map, and click Confirm

Restoring your Mac with Time Machine

You can reinstall Catalina if you have a clean disk drive.

Time Machine can be used to downgrade Big Sur as follows:

  1. As your Mac restarts, hold down the Command keys while you press R
  2. Next, choose to Restore from Time Machine Backup from the macOS Utilities window, then click Continue
  3. Install macOS Big Sur after selecting your Time Machine backup disk and clicking on the most recent backup
  4. You need to choose a destination disk where your backup contents will be saved
  5. Then press Restore and Continue

As long as everything goes smoothly, your Mac should be back in Catalina when it restarts. 

Return to Catalina using a bootable USB drive

It’s much easier to downgrade Big Sur if you’re using Time Machine, but if you can’t, don’t worry. It’s still possible to return to Catalina, it’s just going to take some time.

Set up a bootable drive for Catalina

In order to downgrade to Catalina, you must create a USB drive that can be used with the operating system.  

You can create a bootable USB drive for Mac by following these steps:

  1. Ensure your Mac has more than 12GB of storage by connecting an external drive
  2. After that, install macOS Catalina from the App Store
  3. Next, start Disk Utility by selecting Applications > Utilities
  4. Find your external drive in the list, and then select Erase, choosing the Mac OS Extended format
  5. You can launch Terminal from your Utilities folder once that’s complete. Press Enter after typing or pasting this command: sudo /Applications/Install/macOS/ –volume /Volumes/MyVolume
  6. Log in with your admin password
  7. Exit Terminal, and then eject your USB drive by following the instructions

Boot your Mac from a USB drive

To boot from USB, you’ll need to allow the T2 chip in your Mac. In case you aren’t sure, you can check Apple’s list of T2 Macs.  

Make sure your Mac is ready to boot from an external drive by following these steps:

  1. Start your Mac in Recovery Mode by holding Command+R during startup
  2. Go to Access Utilities > Startup Security Utility  
  3. Please enter your firmware password. The password here is not the same as your Apple ID or administrator password, so make sure you know it before continuing.
  4. Select the Allow booting from external media checkbox  
  5. Observe the process until it is complete

After returning to Catalina, if you want to have an optimized Mac system then you can use Mac Optimizer Pro software. This best Mac cleaner and optimizer will further assist you to speed up your Catalina Os and automatically take care of your Mac within some clicks.

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