This copy of the Install macOS Sierra.app application is damaged [Fixed]

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Are you getting the error message ‘This copy of the Install macOS Sierra.app application is damaged, can’t be used to install macOS‘? Here is the working solution to fix the problem.

Please follow the below steps carefully for solving the problem and making it work. We hope it will work for you.

  1. Go to your apps folder.
  2. Search macOS Sierra installer > Right click on it > then select “Show Package Contents” option.
  3. Click “Contents” folder.
  4. Click “SharedSupport” folder.
  5. Delete the “InstallInfo.plist” file.
  6. Now provide the authentication password.
  7. Now you can open the installer.

Check the all requirements for upgrading your PC to Mac OS sierra. Now the problem will be eliminated. If you have any doubts please ask us below.

4 thoughts on “This copy of the Install macOS Sierra.app application is damaged [Fixed]”

  2. Hello,

    I am facing the similar issue with my Macbook Air early 2015 edition and have tried steps you suggested multiple times. It launches the installation but after a while gives the error message that it’s unable to download Sierra. Please try again from the purchases page. Could you please suggest what may be wrong?

    I have already checked all the minimum requirements etc.

    Thanks & Regards
    Ashish

    Reply

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