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can't upgrade

I'm using a early 2011 macbook pro. when i tried to upgrade my mac from macOS Sierra to High Sierra, it shows "This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS." . what should i do? please help

MacBook Pro 13″, macOS 10.12

Posted on Sep 10, 2020 6:00 AM

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Question marked as Top-ranking reply

Posted on Sep 10, 2020 6:27 AM

Don't use FireFox for this link…


https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12


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 then a new copy more recent version can be downloaded.

2 replies
Question marked as Top-ranking reply

Sep 10, 2020 6:27 AM in response to priyadharshan_wayne

Don't use FireFox for this link…


https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12


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 then a new copy more recent version can be downloaded.

can't upgrade

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