How to install old versions of macOS or OS X

There are some explanations as to why you thought about trying to install an old model of macOS or Mac OS X. You may depend on the software program that has found that it does not work correctly on the latest model of macOS.

You can also be a developer and want to use multiple versions of Mac OS X to ensure that your software program is working properly.

Or maybe you just don’t like the macOS model it was placed on.

Either way, you received questions and we have solutions.

In this article, we’ll talk about how to install old versions of Mac OS X or macOS on your Mac.

We have more information on how to downgrade your Mac work system model, especially for those who want to downgrade from Catalina to Mojave or Mojave to High Sierra, here.

Step 1: Make sure your Mac can run the macOS model

First, you decide whether your Mac can run the macOS or Mac OS X model you really want to install.

As a principle, you can expect your Mac to run any supported macOS or Mac OS X model when the Mac is released and any model released in the next few years immediately after purchase.

We have a complete list of which Macs are working on which versions of Mac OS X and macOS here.

If you’re putting an old model of Mac OS X on an old Mac, you shouldn’t have too many problems.

However, when you want to install a newer model of macOS on an old Mac, it may not be. This is because newer versions of macOS often lose help for older Macs. We have an article here on how to put MacOS on an old Mac.

Likewise, you are likely to find that you simply cannot install an old Mac OS X model on a new Mac, because the {hardware} drivers on your new Mac simply do not exist in the old software program. possibly it will not work. Simply put, Macs cannot boot to an OS X model older than the model provided when new, even if they are placed on a digital camera. If you need to use older versions of OS X on your Mac, you want an older Mac that can use them.

Install the old macOS

Step 2: Download the specified macOS model, Mac OS X.

Next, you want to download the installer for the Mac OS X or macOS model you need to install.

We have a separate article on how to download the old macOS or Mac OS X model here, so when you don’t have the Mac operating system model yet, go there for recommendations on how to get it…

Step 3: Or find an old Time Machine backup

If you received a Time Machine backup before upgrading your Mac, you can go to this part. But remember that you won’t get any files added well because you updated them.

Step 4: install the older macOS model on your Mac

Downgrade macOS

After downloading the installer, you could simply click to install it and your Mac may be up to date (or a little out of date) with the older model. Unfortunately, it is not that simple.

If your Mac is using a newer model of MacOS, you will not be able to install an older model at the beginning. You must completely erase your Mac before installing an older model of macOS or Mac OS X.

Don’t need to completely erase your Mac? There are prospects. For example, you can install the specified model on an external disk. Do you need to use 2 or more versions of macOS, side by side? This can also be a risk.

There are literally several strategies you can use to install an older model of the Mac work system on your Mac. The technique that works best for you is determined by a number of elements, along with whether or not you need to use more than one model. of macOS.

Below, let’s think about the next options:

We even have specific articles for these completely different strategies that go deeper. You will find the links below.

How to revert to an old macOS with Time Machine

If you obtained a Time Machine backup older than the macOS model, you need to say goodbye, this is likely to be the only answer for you.

Here are the steps to take to restore an older macOS from a Time Machine backup:

  1. Start your Mac and instantly hold down Command + R
  2. Keep holding each key until you see the Apple mark or a rotating globe.
  3. When you see the Utilities window, select Restore on Time Machine Backup and click Continue.
  4. Click Continue again.
  5. Choose a Time Machine backup before inserting the macOS model from which you need to return and click Continue.

Remember that when restoring from an old backup, you will lose information added since the update to the macOS model you need to delete.

See how to restore your Mac from a Time Machine backup.

How to downgrade to the operating system provided on your Mac

While we talk about restoration, you can try the next technique to downgrade your Mac to the macOS model it got here. (Actually, it didn’t work for us after we tried it, maybe as a result of our connection to the Web, it wasn’t good, but it should work in concept!)

This is a function of macOS Recovery since macOS Sierra 10.12.4 and you must reinstall any model of macOS provided with your Mac, Apple said.

Apple explains that it is best to shut down the Mac and then keep Shift-Option / Alt-Command-R collectively during the reboot (this is not easy with one hand!).

Here are the steps that Apple describes:

  1. Boot your Mac by pressing Shift-Option / Alt-Command-R.
  2. After viewing the macOS Utilities screen, select the Reinstall Mac OS option.

    Mac recovery mode

  3. Click Continue and observe the instructions on the screen.
  4. Select your startup disk and click Install.
  5. Your Mac will restart when setup is complete.

Note: This will erase your Mac.

How to install an old macOS with a bootable installer

This is mainly a clear installation, which we discuss in more detail here: How to perform a clear installation of macOS. You clean your Mac and install the specified model of macOS on a transparent board.

  1. Download the installer for your desired macOS model from the Mac App Store. Follow the instructions here.
  2. Use this configuration file to create a bootable installer on an external storage machine. Learn more about creating a bootable installer here.
  3. You can then completely erase the entire batch from your Mac and restore it to the factory settings. To start this course, restart your Mac in restore mode by holding down the Command and R keys during the restart.
  4. Your Mac will open in Disk Utility. Click Disk Utility> Continue.
  5. Select the amount of understanding and click Unlink, after which Delete.
  6. Close Disk Utility (Disk Utility> Exit Disk Utility).
  7. Now click on reinstall macOS or reinstall macOS and continue. Follow the instructions to reinstall macOS using the installer you saved to the external drive (link to separate the article above).

Mojave Installer

How to run an older macOS on an external drive

Running a macOS model on an external drive is an excellent answer if you want to use the macOS model when it is installed on your Mac.

You can run a macOS or Mac OS X model on an external storage machine linked to your Mac.

Instead of following the steps here, see this article on how to run macOS on an external drive.

After placing macOS on the external drive, you simply want to keep Option / Alt while booting your Mac, you can choose to boot from that drive.

The benefit of this technique is that you don’t have to clean your Mac. The downside is that the older model of macOS runs slowly, especially if it’s on a gradual USB stick.

bootable disk

How to rotate a macOS on a partition or quantity

Another good option, if you don’t need to restrict yourself to working with just 1 model of macOS, is to install the opposite model (or versions) in a partition or quantity.

Whether it is a partition or quantity is determined by the macOS model placed mainly on your Mac. Installing a macOS model in a quantity is much simpler, however, only the latest versions of macOS help volumes.

See how to run 2 versions of Mac OS X on separate partitions / volumes.

Install the macOS partition

How to install an older Mac OS X on a digital machine

Before installing a Mac OS X model on a digital machine, check out the Apple End User License Agreement. This is an authorized minefield. Read about Apple’s Terms and Conditions and the EULA here.

Like Mac OS X 10.7, Mac OS versions are licensed to run exclusively on a digital machine if the host Mac makes use of the identical model. This implies that placing an OS X 10.8 VM on a Mac that works with an exclusive OS X model is a violation of the software program 10.8 license agreement. The newest model of OS X that can legally run on a digital machine with another OS X host is Snow Leopard (10.6).

The answer here may also be to run the server versions of the work system you want, as long as you obtain the license for the Apple software program.

However, VMware Fusion and Parallels support versions of each OS X buyer and server.

Another factor to note is that the Apple End User Agreement allows you to run Mac OS on 2 digital machines on one computer; however, these digital machines cannot be used for businesses (until you are a registered Apple developer).

Also remember, as we talked about earlier, Macs cannot boot to an older OS X model than the model they arrived here with when they were new, even when it is on a digital camera. If you need to use older versions of OS X on your Mac, you want an older Mac that can use them.

There are a number of software program packages that allow you to run multiple versions of the Mac OS (and even Windows) on your Mac. They incorporate Parallels, VMware Fusion, Virtual Box. Discover the best in studying: Parallels, VMware, VirtualBox, on the other hand.

Regarding digital machines, you can even run Windows and use Windows applications in the same way, read: Run Windows applications on a Mac and install Windows on a Mac.

Originally posted 2020-04-13 06:24:06.

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