Are you experiencing issues with your current Mac operating system? Do you wish to downgrade to a previous version? This guide will walk you through the process of downgrading your Mac OS.

Hi there! Today, we will be discussing how to downgrade the operating system on a Mac computer. Sometimes, certain updates or changes to the OS can cause compatibility issues or performance problems. In these cases, it may be necessary to revert back to a previous version of the operating system. So, let’s dive in and explore the steps involved in downgrading the OS on a Mac.

Preparing for the Downgrade

Before beginning the downgrade process, it is essential to back up all your data. You can use Apple’s Time Machine feature to backup your files. It is also recommended to have an external hard drive to store your backup files.

Check Compatibility

Before downgrading your Mac OS, you must verify the compatibility of the operating system you intend to install with your Mac. Visit the Apple website to check the compatibility of the OS version you want to install.

Check Available Storage Space

Make sure you have enough storage space for the new OS installation. Check the storage capacity of your Mac and ensure that there is enough space for the new OS.

Create a Bootable OS Installation Drive

Create a bootable installation drive for the OS version you intend to install. You can create a bootable drive using a USB flash drive or external hard drive.

Downgrading Your Mac OS

Once you have completed the preparation steps, you can proceed with the downgrade process.

One key takeaway from this text is that before downgrading your Mac OS, it is important to prepare by backing up all your data, checking compatibility, available storage space, and creating a bootable OS installation drive.

Step 1: Boot into Recovery Mode

Restart your Mac and hold down Command + R keys until you see the Apple logo. This will boot your Mac into Recovery mode.

Step 2: Erase the Disk

In the Recovery window, select Disk Utility and click Continue. Select your startup disk and click Erase. Give your disk a name and select Mac OS Extended (Journaled) as the format, then click Erase.

Step 3: Reinstall the OS

After erasing the disk, exit Disk Utility and select Reinstall macOS from the menu. Follow the onscreen instructions to install the OS version you have selected.

Step 4: Restore Your Data

Once the installation is complete, use Time Machine to restore your data. You can also manually transfer your backup files.


If you encounter any issues during the downgrade process, try the following troubleshooting steps:

Check Network Connection

Ensure that your Mac is connected to a stable network connection throughout the process.

Check Installation Drive

If the installation drive is not working correctly, create a new bootable installation drive.

Check for Errors

If you encounter errors during the downgrade process, take note of the error message and search for a solution online. Apple support forums or Reddit communities may provide helpful solutions.

FAQs for How to Downgrade OS on Mac

What does it mean to downgrade OS on a Mac?

In simple terms, to downgrade OS on a Mac means to install an older version of the macOS operating system on a Mac computer that was previously running a newer version. This process is necessary if the newer version of the OS is causing issues or problems on the Mac, or if the user prefers an older version of the OS for compatibility or other reasons.

Can I downgrade OS on my Mac to any older version?

No, you cannot downgrade to any older version of the macOS operating system. Apple only allows downgrading to the previous version of the OS that was released before the current version. For example, if you are currently running macOS Catalina (10.15), you can only downgrade to macOS Mojave (10.14) and not to any older version.

Why would I want to downgrade my Mac’s operating system?

There could be several reasons why you may want to downgrade your Mac’s operating system. One reason is compatibility issues – some apps or software may not be compatible with the latest OS, causing them to crash or malfunction. Another reason could be performance issues – sometimes the newer OS may run slower or cause battery drain issues. Lastly, some users may simply prefer an older version of the OS for personal reasons or familiarity.

Is it possible to downgrade without losing data?

This depends on the method of downgrade you choose. If you opt for a clean install, you will lose all the data on your Mac’s hard drive, including your files, settings, and apps. However, if you choose to downgrade using Time Machine, you can restore a backup of your Mac’s data, including all your files, settings, and apps, to the older version of the OS.

How to downgrade OS on Mac?

To downgrade OS on a Mac, you must first create a backup of all your important data. Then, you can either opt for a clean install of the older OS version or use Time Machine to restore your backup onto the older OS. Before starting the downgrade process, it is always recommended to check the compatibility of the older OS version with your Mac model and hardware specifications.

Is downgrading OS on a Mac a complicated process?

Although downgrading OS on a Mac may seem complicated, it can be done by following a few step-by-step instructions carefully. However, it is always recommended to backup all your data before attempting any OS downgrade. It is also a good idea to seek the assistance of an experienced technician if you are not confident about performing the downgrade yourself.

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