How to fix the MacOS High Sierra application is damaged?

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sammysaenzzz Author

Level 1

5 points

How to fix the MacOS High Sierra application is damaged?

This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS

iMac 21.5″, OS X 10.10

Posted on Sep 4, 2022 9:04 AM

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Answer 1

Top-ranking reply

Niel

Community+ 2025

Level 10

740,705 points

Sep 4, 2022 9:12 AM in response to sammysaenzzz

Choose Applications from the Finder's Go menu, throw the existing installer away, restart the computer, and download it again.

(224095)

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Answer 2

BDAqua

Level 10

250,247 points

Sep 4, 2022 9:38 AM in response to sammysaenzzz

If you’re short of bandwidth or data… 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.

Otherwise Niel has the preferred method.

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How to fix the MacOS High Sierra application is damaged?

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