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Can't download Mojave from App Store

I currently run Sierra 10.12.6 and want to upgrade to Mojave in order to use some of my newly purchased apps on Creative Cloud. I don't want to upgrade to Catalina yet because of losing ProTools plugins. I've followed the link posted in several articles to the App Store Mojave download but keep getting the error message:

"This copy of the Install macOS Mojave application is damaged, and can’t be used to install macOS"

Is there another way to get the download or make that one work?

iMac 21.5″, macOS 10.12

Posted on Nov 28, 2020 8:19 PM

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7 replies

Nov 28, 2020 9:42 PM in response to Niel

I spoke too soon. After deleting and downloading a fresh copy it downloaded the entire file and then gave me the error message at the very end and also when I try to open it. So still in same situation.

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Level 4

2,677 points

Nov 28, 2020 9:49 PM in response to Dreamschooldiary

You do need to have a reliable Internet connection, Dreamschooldiary. A wired connection is preferred, as opposed to Wi-Fi.

Also, make sure you are using Safari to access and download the installer.

Firefox is, apparently, known to cause trouble. (I don’t know that firsthand, only from advice I have read from others.)

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Level 10

731,741 points

Nov 28, 2020 8:21 PM in response to Dreamschooldiary

Choose Applications from the Finder's Go menu, throw the existing installer away, and download a fresh copy.

(187070)

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Level 10

124,637 points

Nov 28, 2020 9:47 PM in response to Dreamschooldiary

Delete the installer and try again while in Safe Mode.

How to use safe mode on your Mac - Apple Support

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Nov 28, 2020 8:26 PM in response to Niel

That did it. Thank you!!!

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Nov 28, 2020 11:49 PM in response to dialabrain

Thanks, that did the trick!

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Level 10

124,637 points

Nov 29, 2020 12:07 AM in response to Dreamschooldiary

You're welcome.

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Can't download Mojave from App Store

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