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I downloaded the macOS Mojave installer on my 2015 MacBook Air. However, upon opening the installer, it gives this error message:

This copy of the Install macOS Mojave application is damaged, and can‘t be used to install macOS.

Please do guide me on how to re-download this installer or any other method to install macOS Mojave on my MacBook.

airsquared
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Jalal Ahmad
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  • you can try this link and download new copy (first delete the non working one) https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12 – Ruskes Oct 22 '18 at 18:14
  • I solved it when I set the internet. It was able to verify the package and it was smooth after that. – liangzan Jul 21 '20 at 10:31

2 Answers2

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As per this discussion on Apple support community, you should be able to overcome the issue by deleting InstallInfo.plist file from within the macOS Mojave installer app.

  1. Go to your applications folder.

  2. Find the installer for macOS Mojave.

  3. Right click on the installer and click "Show Package Contents".

  4. Click on folder named "Contents".

  5. Click on the folder named "SharedSupport".

  6. Delete the file named "InstallInfo.plist".

  7. Enter your administer password to confirm.

  8. Now open the installer.

Nimesh Neema
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    Why does this work? Is InstallInfo.plist" broken? How come? – lhf Oct 24 '18 at 01:19
  • I tried many other solutions, and this is the only one that worked for my Mojave installation problem, which had a different error message: "An error occurred validating the installer data." – Alric Oct 28 '19 at 19:14
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It’s much more likely the certificate that signs the package is expired or there is damage to the contents of the installer, making it fail a tampering check.

Once you validate your mac is connected to the internet and the time is within 3 minutes or so of correct (closer is better) you can check the package or just download it again if that’s easier for you in most cases.

bmike
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