Trying to upgrade my MacBook Pro Sierra Version 10.12.6 to High Sierra (having issues with my photos taken with my iPhone 12). The app store says "This copy of the Install macOS High Sierra application is damaged, and can‘t be used to install macOS." Anyone run into this issue and/or have a work-around?
MacBook Pro 13″, macOS 10.12
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, 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…
Choose Applications from the Finder's Go menu, throw the existing installer away, restart the computer, and download it again.
(217779)
Thanks Niel and BDAqua! Deleting the old install app and restarting appears to be working (all be it slow).
You're welcome, great news, take care my friend. :)
App stores says macOS High Sierra application is damaged and can't be used. Help?
