When I click "Download" Mojave installer, I get error message "This copy of the Install macOS Mojave.app application is damaged, and can‘t be used to install macOS." Intent to upgrade from Sierra 10.12.6; Catalina loses some apps, Mojave won't run.?

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When I click "Download" Mojave installer, I get error message "This copy of the Install macOS Mojave.app application is damaged, and can‘t be used to install macOS." Intent to upgrade from Sierra 10.12.6; Catalina loses some apps, Mojave won't run.?

MacBook Pro 13″, macOS 10.12

Posted on Jul 7, 2022 6:46 PM

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Answer 1

Top-ranking reply

tjk

Level 9

51,126 points

Jul 7, 2022 7:01 PM in response to MadMacMonty

Hi,

Open your Applications folder and trash "Install Mojave..." then download it again, using Safari. If it doesn't work, try booting into Safe Mode: How to use safe mode on your Mac - Apple Support and see if the issue persists there.

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Answer 2

BDAqua

Level 10

245,219 points

Jul 9, 2022 10:40 AM in response to MadMacMonty

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 Mohave App in Applications, so expired Certificates are not expired.

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

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