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i am trying to upgrade my macOS from 10.12 to 10.13 and keep getting an error. how can you help me?

When I try to download the 'Install macOS High Sierra.app application I keep getting an error 'application is damaged, and can't be used to install macos' - where can I download the install app? I am trying to upgrade from 10.12 to 10.13


iMac 21.5″, macOS 10.12

Posted on Dec 25, 2022 2:13 PM

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Posted on Dec 25, 2022 2:20 PM

Choose Applications from the Finder's Go menu, throw the existing installer away, restart the computer, and download it again.


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3 replies

i am trying to upgrade my macOS from 10.12 to 10.13 and keep getting an error. how can you help me?

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