How to downgrade to the OS that shipped on your Mac Here’s how to restore your Mac from a Time Machine backup. Remember that if you recover from an old backup you will lose the data you have added since updating to the version of macOS you wish to uninstall. Choose a Time Machine backup from before you installed the version of macOS you wish to revert from and click on Continue.When you see the Utilities window choose Restore from Time Machine Backup and click on Continue.Continue holding both keys until you see the Apple logo or a spinning globe.Start up your Mac and immediately hold down Command + R.Here are the steps you need to take to recover an older macOS from a Time Machine backup: If you have a Time Machine backup that predates the version of macOS that you want to bid farewell to, then this could be the simplest solution for you. How to revert to an old macOS using Time Machine We also have dedicated articles for these different methods that go into more detail, you’ll find links below. Run the version of macOS in a virtual machine.Run the version of macOS in a partition or a volume.Run the version of macOS on an external drive.Install macOS using a bootable installer.Revert to the version of macOS installed when you purchased your Mac.The most appropriate method for you will depend on a number of factors including whether you want to run more than one version of macOS.īelow we will look at the following options: There are actually multiple methods you can use to install an older version of the Mac operating system on your Mac. You could install the version you require on an external drive, or you could run two or more versions of macOS alongside each other. Not keen on completely wiping your Mac? There are options. You will have to completely wipe your Mac before you can install an older version of macOS or Mac OS X. If your Mac is running a newer version of the macOS you won’t be able to install an older version on top of it. Once you have the installer downloaded you might think you can just click to install it and your Mac will be updated (or rather, downgraded) with the older version. Step 4: Install the older version of macOS on your Mac But remember you won’t be recovering any data you have added since you upgraded so you might want to save that somewhere you will be able to access later. If you have a Time Machine backup from before you updated your Mac to a newer macOS you can jump to this section. We have a separate article about how to download an old version of macOS or Mac OS X, so if you haven’t got the version of the Mac operating system you want pop over there for advice on how to get it… Step 3: Or find an old Time Machine backup Next you need to download the installer for the version of Mac OS X or macOS you wish to install. Step 2: Download the version of macOS, Mac OS X you require We have a separate article about installing macOS on an older Mac. This is because newer versions of macOS tend to drop support for older Macs. If you were hoping to install newer version of macOS on an old Mac you might find that you can’t. If you are installing an old version of Mac OS X on an old Mac you shouldn’t have too many difficulties though. To help you find out what versions of macOS your Mac supports we have a full list of which Macs each version of Mac OS X and macOS. However there may be exceptions, for example, if you bought a Mac in 2017, but the spec hadn’t changed from the predecessor, or the model was actually introduced a few years earlier, you may find you can run an older version of macOS on it. If you want to run older versions of OS X on your Mac, you need to get an older Mac that can run them. Simply speaking, Macs cannot boot into an OS X version older than the one they shipped with when new, even if it’s installed in a virtual machine. ![]() You may find you can’t install an old version of Mac OS X on a new Mac because the drivers for the hardware in your new Mac simply don’t exist in the old software, so it can’t run. Now for the bad news: It is unlikely that your Mac will be able to run a version of macOS or Mac OS X that is older than the one that was installed on it when you bought it. Step 1: Check your Mac can run the macOS versionįirst you need to confirm that your Mac will be able to run the version of macOS or Mac OS X you want to install.Īs a guide, expect your Mac to be able to run any version of macOS or Mac OS X that was supported when that Mac launched, and any that were released in the few years immediately following your purchase. We’ll also explore some of the issues you might encounter along the way. We’ll walk you through all the steps below for installing an older version of macOS on your Mac – from making sure your Mac can run the version, to where to download the old version of macOS from, and how to install the old version on your Mac.
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