I want to create a USB macOS installer. When I click the “open” button to download the High Sierra installer, a message window pops up that says “This copy of the install macOS High Sierra application is damaged, and can’t be used to install macOS.”

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I want to create a USB macOS installer. When I click the “open” button to download the High Sierra installer, a message window pops up that says “This copy of the install macOS High Sierra application is damaged, and can’t be used to install macOS.”

I want to create a USB macOS installer. When I click the “open” button to download the High Sierra installer, a message window pops up that says “This copy of the install macOS High Sierra application is damaged, and can’t be used to install macOS.” Is this something that Apple Support maintains?

Mac mini 2018 or later

Posted on Mar 13, 2021 7:46 PM

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Answer 1

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Niel

Level 10

732,479 points

Mar 13, 2021 7:49 PM in response to SpeakersCorner

Choose Applications from the Finder's Go menu, throw the installer away, and download another copy.

(194029)

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I want to create a USB macOS installer. When I click the “open” button to download the High Sierra installer, a message window pops up that says “This copy of the install macOS High Sierra application is damaged, and can’t be used to install macOS.”

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