How to Downgrade Mac OS


Downgrading your Mac OS is a process of reverting back to an older version of the macOS operating system. It’s most commonly used when users are having compatibility issues with their computer or apps, or if they want to revert to an older version for some other reason.

Before getting started

Before getting started with a new version of macOS, it’s important to understand the release process and some potential caveats. Apple typically releases its new software versions in September, October, or November each year. The newest version is first revealed during their Worldwide Developers Conference in June. Apple implements beta testing of their software for both developers and public beta program participants to identify and address any potential concerns prior to the official release. Unfortunately, no matter how long a piece of software is tested, there can still be unexpected bugs lurking once it becomes available for general use. Third-party app developers may require additional time to make necessary modifications to fully support new versions, even if they are free of bugs.

That’s why some folks may opt to delay upgrading until after one or two bug fix updates are released – great if you’re comfortable manually updating your OS; otherwise you may want to wait until an incremental update version provides an overall more stable and reliable experience.

Ensure compatibility of your Mac with the previous version of macOS

When making the decision to install an older version of macOS or Mac OS X on your Mac, you need to first make sure it will be able to run the new version. Generally speaking, it is safe to assume that your machine can handle any macOS or Mac OS X that was supported at the time it was bought and any released in the several years afterwards. Unfortunately, due to missing hardware drivers, Macs may not be able to boot into an OS X version older than the one they shipped with when new. It is important for users to consider this when attempting install a much earlier version of macOS or Mac OS X on their devices.

To further ensure that your computer will be able to smoothly run any given version of macOS or Mac OS X software, research about potential compatibility issues ahead of time. Read reviews from other customers who have attempted running the specific variant you’re interested in on their own machines beforehand so you enter with all relevant knowledge needed to successfully set up and use the new system effectively. This should help reduce any surprise problems and give you insight into how well older versions perform in comparison with modern operating systems.

Backup your data prior to downgrading

Downgrading your macOS version is a great way to stay up to date with the latest software. It’s also advantageous if you experience bugs or performance issues on your current system. However, before going ahead with this process, be sure to back up all of your data beforehand! No matter which method you use, everything on your hard drive will be erased. The easiest and most popular way to do this is with Apple’s built-in Time Machine service. However, if you plan on reverting back after downgrading (as opposed to a fresh installation) then you must only restore personal data so as not to undo the downgrade – otherwise you’ll have to go through the entire process again. To avoid any potential risks, there are several alternative backup solutions available too. Cloud storage platforms such as iCloud and Dropbox make it easy to store vital files remotely so they can be accessed from different devices in addition to being kept safe from system errors and crashes. Additionally, external hard drives are also a great option for storing large amounts of information securely for future retrieval. In any case, taking these simple steps before attempting any major changes like downgrading an operating system will save a lot of hassle further down the line!

Perform a downgrade of macOS by using the recovery function

Downgrading process of your Mac to a previous version of macOS is a straightforward and simple method, if your machine originally shipped with an older version. The macOS Recovery tool makes it easy, as all you need is internet access and the right setup. This method only works on Intel-based Macs and can’t be used on newer Apple silicon Macs like the M2 MacBook Air; for those models, the Time Machine or bootable disk method must be used.

The actual downgrading process from macOS with this tool is similar to reinstalling the software but instead uses the version that was originally included on your computer. When you download this version, it allows you to keep all data and personal settings as-is – no backing up necessary! You may have to reinstall certain applications after downgrading, however, and make sure any versions running are compatible with macOS versions before 10.14 or earlier depending on your Mac’s original operating system specifications.

Utilize the Time Machine backup to revert to a previous version

Using a Time Machine backup is a great way to install an older version of macOS without having to go through the hassle of manually downloading and installing it. By using a prior version of the operating system stored on your disk, you can easily downgrade and get back to using an older version of macOS. To downgrade using a prior Time Machine backup, first you must plug in your time machine disk into your Mac and make sure that it is powered down or restarted. To enter macOS Recovery on an Intel Mac, you can boot it into Recovery mode by holding Command + R.

After following these simple steps, you can then restore this ready-made operating system onto your machine. This process is incredibly easy, especially when compared to the more difficult process of manually downloading and installing an old OS.

Rollback to a previous macOS version using an older installer

When you want to downgrade to an older version of macOS, it’s now a bit more difficult than before. This is due to the updates made to the Mac App Store since Mojave. Apple now requires users to obtain older versions of macOS from their Support site. Apple silicon Mac users who want to switch back to an earlier macOS version on M1 and M2 devices cannot use the default Recovery mode as it only installs the latest version of macOS.

Once you have obtained the installer, either through your Purchases section in System settings or on Apple’s Support website, you can save it in your Applications folder and create a bootable disk with Disk Utility. This will allow you to reinstall an older version of macOS directly onto your system. Whether this is done out of necessity or something else, like running an app that isn’t compatible with the current version, it remains critical that users are aware of this extra step when upgrading operating systems on their Mac.

Using a bootable drive to install a previous version of macOS

Installing an old version of macOS on your Mac may be necessary for a variety of reasons. Whether you need to be using a specific version compatible with your existing hardware, software or applications, or due to some issue that arises necessitating a downgrade, an external bootable installer is the best way to do it.

The process begins by downloading the installation file from the Mac App Store for the version of macOS you require. Afterwards you will be following instructions found on Apple’s support site to create a bootable installer on an external storage device which consists of connecting that device to your Mac and using Disk Utility within macOS to install your chosen OS onto it. Once completed, you can then disconnect the device and connect it to the Mac which needs reinstalling, then power up while holding down Option at startup in order to start up from the external drive and begin re-installing your desired older version of macOS!

External Drive

Before you create the installer for your device, it is important to ensure that the external drive which you are using is formatted correctly. This requires the external drive to be in a compatible file system such as HFS+ or APFS. To begin, plug in your external drive and then launch the Disk Utility app. Once the Disk Utility app is launched, you will need to select your hard drive from the list of available drives. Then, click on Erase at the top of the window and select either “HFS+” or “APFS” from the dropdown menu bar followed by clicking “Erase”. This should set up your external drive for use with creating an installer for your device.

Having a properly formatted external drive is essential before moving onto any further steps to create an installer for your device. Be sure to double check and make sure that your drive is listed as either HFS+ or APFS before continuing with any other steps, so that you can ensure efficient functioning of all components later on down the line. Formatting an external usb is a quick easy process which can save lots of time in other aspects down further along in creating an installer— so don’t forget.

Creating the Installer

Creating an installer is a must if you’re upgrading your system to a new macOS version. It involves a few simple steps that can be done on any device which already has the installation files for the earlier version of macOS. The very first thing to do is to plug in your external hard drive, then launch the Terminal app and follow the command needed for your specific macOS version. For example, if you’re creating a bootable drive for macOS Ventura, you can use “Ventura” as it is in the command given on this guide. Replacing “Ventura” with other versions will work as well and result in an installer file named Untitled. This can be used as a bootable disk and allow you to install your new version of macOS without problems.

When following this guide, be sure that all of your important files are safely backed up before proceeding as your system might be reformatted while doing so. Also make sure that you have compatible hardware requirements such as enough RAM and storage space before continuing with the installation process. All users should keep in mind their safety when using the software updates or any programs associated with it, always remain vigilant in keeping your device virus-free and protected.