How to Download the High Sierra Installer Under Mojave

1 minute read
| Quick Tip

For a long time now, if you needed an older macOS installer (such as Sierra or El Capitan), you could visit the App Store, go to your “Purchased” page, and re-download anything you’d used in the past. This was helpful if, for example, you had an older Mac that you wanted to troubleshoot or reinstall the operating system on; you could then use that downloaded macOS file to create a bootable installer. 

Unfortunately, though, this is no longer possible in macOS Mojave. The App Store’s “Purchased” page doesn’t show the operating system installers as downloadable options anymore, and searching for “High Sierra” (or “Sierra” or “El Capitan”) in the App Store doesn’t turn up any relevant results. As a consultant who…you know…needs copies of these installers for work, this is a wee bit frustrating. Fortunately, there is a way to get around this and download High Sierra, at least. Here’s how!

To begin with, go to this Apple support article and click “Go to the Mac App Store.”

"Go to the Mac App Store" Link

When you click that link, you should end up at the App Store page for High Sierra.

macOS High Sierra in App Store

Click “Get” as shown on that page, and System Preferences will open and check for the update.

"Finding Update" Dialog in System Preferences

Your Mac will ask you to confirm what you’re doing, and you’ll click “Download.”

macOS High Sierra Dialog in System Preferences

And then you’ll see a progress bar! 

Progress Bar in System Preferences

You’ll get a warning after it’s done downloading that High Sierra is too old to be opened by Mojave, but that’s okay. You don’t need to open it for troubleshooting on your old Mac, so you can just click “Quit.”

Warning Dialog that High Sierra Is Too Old

After everything is finished, you can follow the instructions in this Apple support article to create a bootable installer for your older Mac. One thing to note, though: If your troublesome computer won’t run High Sierra and you need an even older version of macOS, you may be out of luck. I haven’t found a way to access Sierra or earlier, even when I’ve gone through Apple’s support pages clicking direct download links. I’m seeing this error when I try:

"Update Not Found" Dialog Box

So, you know, if any of you have found a way to get older operating systems in the App Store, be sure to comment and tell me how! And no, “maybe you should have thought of that before upgrading to Mojave” isn’t helpful, friends.

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BlackCorvid
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BlackCorvid

So, if you’re still running High Sierra, or Sierra as your default system (or on a second partition), one can still download copies of Sierra or High Sierra. It’s only with Mojave that you’re locked out of Sierra downloads. I think it’s time to make that download now while I can and put it aside, just in case…

furbies
Member
furbies

And this is why I’ve always kept copies of the OS installers, going all the way back to 10.1.0….

C’mon Apple. It won’t kill ya all to leave the OS installers available.
I’m sure there are more than a few Apple devotees that would appreciate being able to get a fresh copy of a superseded OS…

Graham McKay
Member
Graham McKay

Thanks for pointing this out. The “trick” does indeed rely on Apple not deprecating the internal links to the actual download files.
My further discovery in Mac App Store on a 10.12 MBP is that it no longer shows me any “purchased” version of macOS – only versions of OS X.
ie. I can see Lion, Mountain Lion, Mavericks, Yosemite, El Capitan but not Sierra, High Sierra, or Mojave.