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Level 1

4 points

os upgrades

my MAC wont let me upgrade any newer versions of OS - i tried high sierra and said the installer was damaged?

iMac 27″, macOS 10.12

Posted on Jun 4, 2022 9:20 AM

Top-ranking reply

Level 10

203,758 points

Posted on Jun 4, 2022 9:22 AM

It's not actually damaged, it's just out of date. The certificate it was originally signed with is no longer valid.

Delete the installer and re-download it.

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