Can't Install MacOS Error FIX - PC 911 Computer and iPhone Repair

Can’t Install MacOS Error FIX

Hey everybody, if you are trying to install or upgrade a MacOS and you are getting the “This copy of the install macOS High Sierra application is damaged, and can’t be used to install macOS.” message I will show you a solution for that if it ends up being like this scenario. We use a USB install to install the OS. The message means the date is wrong, that it is expired to download the OS. So what you have to do at least for High Sierra, is go back 6 months if that doesn’t work do another 6 months until it works, that is what we did with ours. So I change the date a couple months back to January 2019 and the install worked and I was not getting the error message. And that is my tip for the day.

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