Downloading MacOS High Sierra 10.13 on iMac

When I go to the App Store to download High Sierra 10.13, I get this message: This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS. What do I need to do?

iMac Line (2012 and Later)

Posted on Jan 20, 2020 5:39 PM

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Posted on Jan 20, 2020 5:46 PM

Naw, it's just that you have an old copy already in Applications, there are 2 cures...


Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS High Sierra App in Applications.


Or... trash the App in Applications then a new copy can be downloaded.

6 replies
Question marked as Top-ranking reply

Jan 20, 2020 5:46 PM in response to dburchi1

Naw, it's just that you have an old copy already in Applications, there are 2 cures...


Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS High Sierra App in Applications.


Or... trash the App in Applications then a new copy can be downloaded.

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Downloading MacOS High Sierra 10.13 on iMac

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