Im trying to upgrade from Yosemite to macOS High Sierra and it says "this copy of the Install macOS High Sierra application is damaged, and can't be used to install macOS. Now what do I do?
iMac, OS X 10.11
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…
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…
Im trying to upgrade from Yosemite to macOS High Sierra and it says "this copy of the Install macOS High Sierra application is damaged, and can't be used to install macOS. Now what do I do?
