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Bian99 Author

Level 1

4 points

Error when trying to update to High Sierra

from the app store get to the front screen click on open;

this copy of the application in damaged and can't be used.

but doesn't tell me what to do?

currently running 10.10.5

thanks

iMac 21.5″, OS X 10.10

Posted on Jun 24, 2021 10:52 AM

Best reply

BDAqua

Level 10

239,483 points

Posted on Jun 24, 2021 12:54 PM

If you get a corrupted message...

Naw, not damaged, 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, so expired Certificates are not expired.

Or... trash the Install MacsOS High Sierra.app in Applications, empty trash & restart, then a new copy of a more recent version can be downloaded…

Don't use FireFox for this link, it’ll offer strange erroneous errors…

https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12

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Error when trying to update to High Sierra

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