- How to erase and install new mac os how to#
- How to erase and install new mac os mac os x#
- How to erase and install new mac os drivers#
How to erase and install new mac os how to#
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
How to erase and install new mac os mac os x#
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. Similarly, 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.
How to erase and install new mac os drivers#
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. If you want to downgrade the latest version of the Mac operating system to the one before then you might find it helpful to read: How to downgrade macOS Monterey to Big Sur or older. Whatever your reason for wanting to install an older version of macOS the great news is you can install an older version of macOS and we will explain how. Or possibly you just don’t like the version of macOS that you have installed. Maybe you are a developer and you need to be running multiple versions of macOS so that you can be sure that your software runs correctly on them. Perhaps you are relying on software you have discovered doesn’t work properly in the newest version of macOS and you want to downgrade macOS. There are a few reasons why you might want to install an old version of macOS or Mac OS X:
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