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It seems that Apple deleted the Mac OS Sierra installer from the app store search and purchased pages. How can I get it now, in case my update to High Sierra goes wrong?

EDIT : As asked in the comments, I'm running Sierra at the moment, and I upgraded from lion.

  • @Allan I'm using Sierra now, I upgraded from lion if I remember correctly. If this is useful info, do you want me to edit that in the question? – WayToDoor Sep 28 '17 at 21:23
  • You may want to read Monomeeth's question at apple.stackexchange.com/q/286311/205310 – user205310 Sep 28 '17 at 22:18
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There are several websites that unofficially host the installer of macOS Sierra, but due to reasons, I cannot provide you a link unfortunately.

I do want to point out that it’s quite easy to reinstall macOS in case something goes wrong while updating. Just make sure you have a backup (e.g. with Time Machine) and you should be fine.

In case something does go wrong, press and hold the power button to force you Mac to shutdown. Turn it on and immidietly press and hold cmd + R until you see the Apple logo. You should now be able to reset your Mac from there.

Update: If you downloaded the Sierra installer before using your Apple ID, you should be able to download it again using the Purchases tab in the Mac App Store.

  • The Sierra installer won't show up in the purchase tab unfortunately. And, external sites are known to sometimes distribute malware... If possible, I'm looking for a direct link to the installer on Apple servers. But maybe it's impossible and, in this case, I'll use your method – WayToDoor Sep 28 '17 at 21:25
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    You may want to read Monomeeth's question at apple.stackexchange.com/q/286311/205310 – user205310 Sep 28 '17 at 22:21
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    Maybe you could try downloading the installer from an external website, and check the SHA1 checksum. Compare it to this list I found on Github: github.com/notpeter/apple-installer-checksums/blob/master/… – Jelle Zwiers Sep 29 '17 at 12:25
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Apple makes Sierra available even after High Sierra is released.

The link to the installer on the Mac App Store is: https://itunes.apple.com/us/app/macos-sierra/id1127487414?ls=1&mt=12

It's best to go to the article, though and check compatibility and an updated link if that comes out over time.

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