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User profile for user: SweedVette
SweedVette Author
User level: Level 1
8 points

This copy of the install macOS high sierra application is damaged

How do I download and install High Sierra? I can't even download a version without an expired cert.

iMac 27", macOS 10.12

Posted on Feb 1, 2020 3:47 PM

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User profile for user: macjack
macjack
User level: Level 10
111,204 points

Posted on Feb 1, 2020 3:51 PM

First delete any installers you may have in Downloads or in Applications. They would be called "Install Mac OS High Sierra". Then restart your Mac and download from this link:

Get macOS High Sierra

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This copy of the install macOS high sierra application is damaged

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