Despite the fact that Mojave updates come via Software Update, you can still download the installer from the Mac App Store. Alternatively, find a Mac that's running an older version of the macOS, log into the Mac App Store with your password and download High Sierra's installer. Or ask a friend to download a copy of the installer from the Mac App Store for you. As above, once the installer has downloaded don't install it! If you do then the installer will be deleted. You'll find the installer in your Applications folder.
Beware of downloading the installer from a file sharing site as you can't be sure that it's safe. It's safest to say: just don't do that.
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In , when Apple introduced MacOS High Sierra, the company removed Sierra from the Purchased list, which made it more difficult to revert to that earlier version, but it was still possible to download the Sierra installer via this link that Apple provided. We have been able to download the installer on older versions of MacOS though. So as above, find a friend who isn't running Mojave.
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Yosemite, Mavericks and Mountain Lion can all be seen here. Another reason why the version of Mac OS X might be missing is if your machine shipped with that version installed. We'll look at that scenario later. Here is how to get an older version of Mac OS X from the Mac App Store this only works if you've downloaded it in the past and it won't work if you have already installed Mojave or Catalina :.
Clicking Install won't actually install the software, but it will download the installer application to your Applications folder. You won't be able to simply install this older version of the operating system directly onto a Mac running a newer version of OS X or macOS.
We will explain how it can be installed on a Mac - including one currently running an earlier operating system here: How to install old Mac OS X versions. If you never downloaded the version of Mac OS X then jump to step 3 and find a friendly person who did. Ask them to download the Mac OS X installer for you. The one thing you really mustn't do is go to a torrent site and download a copy of the OS X you want. Just because Apple gives away its software for free, don't think it's fine to just pick up a copy.
Pirated copies of Apple software could have been adjusted to allow hackers access to the software and your Mac. Apple has been removing Macs that don't support bit processors from its OS X compatibility list since it introduced Snow Leopard. With Mountain Lion, Apple is further trimming the compatibility list by being very strict about what constitutes full bit support. However, some of the Mac models that didn't make the cut this time, such as earlier versions of the Mac Pro, do have a full bit Intel processor.
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So, what kept them out of the running? Mountain Lion can only boot in bit mode, so any Mac that has bit EFI boot firmware won't be able to run it. If you're not sure if your Mac will make the cut or not, you can find out by following these steps:. The second entry in the Hardware Overview list is the Model Identifier. Compare the Model Identifier with the list above. In the About This Mac window that opens, make sure the Overview tab is selected.
The first two entries will include your Mac model and the release date for the model. You can compare this information against the model list above. There's another way to check whether your Mac can be updated.
You can use Terminal to verify that your Mac boots using a bit kernel. Terminal will return a few lines of text indicating the version of the Darwin kernel this is being used. The above process will only work if you're running OS X Lion.
How to Upgrade Mac to macOS High Sierra
If you're still running OS X Snow Leopard, you'll need to force boot into the bit kernel by restarting your Mac while holding down the 6 and 4 keys. Some Macs that aren't on the list above may still be able to run Mountain Lion, provided they can successfully boot using the bit kernel. This is possible if you've upgraded an older Mac by replacing a logic board, a graphics card , or another major component. If your Mac can't make the jump to Mountain Lion, you may still want to upgrade to Snow Leopard or Lion, if you haven't already.
If your Mac is running the latest OS it can support, you'll be able to receive software updates, and more importantly, security updates, for as long as possible. Apple usually provides security updates for the current version of the OS, as well as the previous two versions of the OS.
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