Corrupted Sierra OS

Question

cherbp Author

Level 1

12 points

Corrupted Sierra OS

Error message: This copy of the Install macOS Sierra application is damaged, and can't be used to install macOS.

I have

1) backup my disk before downloading

2) tried downloading and installing in normal mode

3) delete

4) tried downloading and instilling in safe mode

all files downloaded are in its 4.78GB (is it supposed to be more?)

I am using a stable wi-fi for download and at no point in time was my computer sleeping

Also i tried to install other stuff (after failing to install the OS) from appstore

Error msg: ___ app failed to download. Use purchases page to try again

I used purchases page to "try again" - still receiving the same error.

Using Early 2015 MBP 13" - have sufficient space (28GB) for download

Posted on Sep 20, 2016 8:45 PM

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Answer 1

Dec 18, 2017 9:22 AM in response to Thubredhal

Trying to install to a late 2012 Mac Mini.

Following these steps, it will actually run the installer, but then just before starting the install process, I get the following error...

"An error occurred while preparing the installation. Try running this application again."

Date and time are fine.

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Answer 2

Sep 20, 2016 8:50 PM in response to cherbp

Verify your preference in

>Sys Preferences>Date & Time>Set Date and Time automatically

This can help the server recognize your region for authentication for the download installer

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Answer 3

cherbp Author

Level 1

12 points

Sep 20, 2016 8:53 PM in response to leroydouglas

mine is grey-ed out (because I locked it) but there is a tick saying it is set automatically

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Answer 4

al_b

Level 1

4 points

Sep 21, 2016 4:08 PM in response to leroydouglas

Or it might be the next setting panel the ”Time Zone” / as the one you suggested didn`t work. You have to allow apple to localize you exactly. After two failed attempts, I`m giving a try with the setting time after your location checked.

Little later.

Well... it looks like neither of these works. I cannot have sierra installed on a iMac 2015. Holy caramba! I still have Ubuntu on a stick.

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Answer 5

Sep 21, 2016 4:59 PM in response to cherbp

I am having this very same issue on a Macbook Pro Retina 15in late 2013. Installed flawlessly on my Mac Mini 2012.

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Answer 6

Sep 21, 2016 5:18 PM in response to cherbp

Step 1. Go to your applications folder.

Step 2. Find the installer for macOS Sierra.

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

Step 4. Click on folder named "Contents".

Step 5. Click on the folder named "SharedSupport".

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

Step 7. Enter your administer password to confirm.

Step 8. Now open the installer.

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Answer 7

Sep 24, 2016 12:53 PM in response to Thubredhal

This work flawlessly, thank you very much for your help!

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Answer 8

Sep 26, 2016 11:06 PM in response to RFrost689

Your welcome!

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Answer 9

Paul_Jam

Level 1

4 points

Oct 1, 2016 1:17 PM in response to Thubredhal

Thanks. It Works 🙂

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Answer 10

mjugend

Level 1

8 points

Nov 1, 2016 4:13 PM in response to Thubredhal

It does download it but it freezes or just stops when trying to install, any suggestion?

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Answer 11

Eric Root

Level 10

684,027 points

Dec 18, 2017 5:50 PM in response to serogers1970

Try installing in another admin user account.

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Answer 12

Dec 20, 2017 11:50 AM in response to Eric Root

Tried as root and get the same results.

Redownloaded the installer fresh, deleted the INSTALLINFO.PLIST, date/time is fine.

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