Mac OS sierra app is damaged

Tried the approached to fix the error "This copy of the Install macOS Sierra application is damaged, and can't be used to install macOS."

But none of above, works for me.

Seeing following in my

Console logs:

∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞

∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞∞

Any suggestions on how to install the mac Sierra?

Same issue.. i.e. "This copy of the Install macOS Sierra application is damaged, and can't be used to install macOS."

And console logs:

∞∞∞∞∞∞∞∞∞∞∞∞∞

9/27/16 20:40:10.999launchd[1]: BUG inlibdispatch: 15G1004 - 1718 - 0x0

9/27/16 20:40:12.665 osinstallersetupd[861]: objc[861]: Class OSISProductManager is implemented in both /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/OSInsta llerSetupInternal and /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/PlugIns /OSInstallerCompatibility.bundle/Contents/MacOS/OSInstallerCompatibility. One of the two will be used. Which one is undefined.

9/27/16 20:40:12.665 osinstallersetupd[861]: objc[861]: Class IA_PKDownloader is implemented in both /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/OSInsta llerSetupInternal and /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/PlugIns /OSInstallerCompatibility.bundle/Contents/MacOS/OSInstallerCompatibility. One of the two will be used. Which one is undefined.

9/27/16 20:40:12.665 osinstallersetupd[861]: objc[861]: Class IA_PKDownloaderSpeedTracker is implemented in both /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/OSInsta llerSetupInternal and /Applications/InstallmacOSSierra.app/Contents/Frameworks/OSInstallerSetup.frame work/Versions/A/Frameworks/OSInstallerSetupInternal.framework/Versions/A/PlugIns /OSInstallerCompatibility.bundle/Contents/MacOS/OSInstallerCompatibility. One of the two will be used. Which one is undefined.

9/27/16 20:40:12.000 kernel[0]: hfs: mounted OS X Install ESD on device disk1s2

9/27/16 20:40:12.980 mds[69]:(Volume.Normal:2464) volume:0x7fdddd02e000 ********** Bootstrapped Creating a default store:1 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/OS X Install ESD

The only way I was able to install it on the one computer that was causing me trouble was to use Disk Maker X (or do it manually) and create a bootable USB of Sierra and install from that. It is a workaround as opposed to a real fix, but it worked. It even worked with the "damaged" copy of the installer from that particular computer.

Did you try?

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. Then 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.

I did the below suggested steps, now error is not coming but the installation is struck at the "Install macOS" window after accepting the policies and the selecting the drive to install, on the screen it says About 5 mins remaining but nothing is happening even after 1 hour also.

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. Then 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.

I had the exact same problem with getting the dialog saying that the app was damaged. As I write this to you I am installing macOS Sierra. I achieved this by downloading a program called OnyX from Titanium Software. Be very careful what you do with this program by reading the help files carefully. It will fix whatever might be jacked up on your system prohibiting you from installing Sierra. Good luck and may the force be with you!

It's actually happening! I am currently installing macOS Sierra. This event has been a weeks worth of reading and retrying. The Sierra install helper tool that is downloaded from the Mac App Store does a quick check of your system, exactly what it looks at I'm not sure, and either continues with the install or aborts with a cryptic dialog about the install app being damaged and thereby unusable to install Sierra. I arrived at the cryptic dialog seven times out of seven previous attempts. After reading ALL the posts in the Apple Communities forum on macOS Sierra issues, I realized I had read only one post from someone who had actually been successful getting past the cryptic dialog. He achieved that by running a program on his system first called OnyX. I do run maintenance apps on my iMac but nothing as deep and detailed as this OnyX program goes. I downloaded the free program and installed it. I ran through all the tabs being very careful. It took 4 runs of the OnyX Automation run to finally get a run with no changes made. I rebooted and tried to execute the Sierra install app and it worked! YeeHaw!!!!!

This is really bad even I am getting "This copy of the Install macOS Sierra application is damaged, and can't be used to install macOS."

The best part is the installation works on MacBook Air but shows the above error for MacBook Pro. I also think its giving error for those machines which has EL Capitan installed.

buddhasource,

Please see postings from LincPosty in this discussion thread on October 5, 2016. The problems you are having have nothing to do with the type of laptop you are using or the previous OS installed. The problem you are having is related to file locations, permissions, and other OS files not being as macOS Sierra expects them to be. There are 2 apps I can refer to you, CleanMyMac 3 and Onyx. The first is great for daily, weekly, and monthly maintenance tasks. The second is what I used to solve the problems when I was having the same issue as you. PLEASE USE CAREFULLY! I would suggest that you concentrate your efforts in correcting any issues regarding the previously mentioned OS files that are called out as a result of running the aforementioned apps. May the Force be with You!

This was the only thing that worked for me. I had tried every other suggestion in this forum, and all of them came up empty. I even used Onyx once, and things still didn't work. But when I saw you ran Onyx 4 times, I decided to try to do it multiple times as well. After running the Automation scripts 3 times, I finally was able to install Sierra. So thank you for sharing that you ran it multiple times! Worked for me! (Finally!)

slvrstrk got it right: the problem in my case was that the time and date were wrong. I connected to a network, ran ntpdate in Terminal as they described, then ran the installer and all was well. My guess is that the installer is validating itself cryptographically using a certificate, and the certificate appears invalid if the date is off.

Before starting installation run Terminal and check the system date using date command. If it is not okey than change the date following https://bensmann.no/changing-system-date-from-terminal-os-x-recovery/.

This solution worked for me. My laptop was very old and after opening up terminal it appeared that the date was off by a large amount. I set the date as per the link posted by user, blgnksy, restarted the laptop and now my usb install process progresses past the error. Hope this info helps!

I am try restore a completely damaged disk - was trying to install.

Get the same message as above. So I remove the stated file ... Then it cannot even create the boot usb drive.

sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Install\ macOS\ Sierra --applicationpath /Applications/Install\ macOS\ Sierra.app

Password:

/Applications/Install macOS Sierra.app does not appear to be a valid OS installer application.

If I just restore the file, it at least creates the drive.

I am trying to install Sierra on around a 4/5 year old MacBook Pro.

Its weird this issue goes on, as High Sierra is out for almost a week.

So... Onyx is a solution, despite somebody using here the „I” argument (I would not use Onyx). Sierra and High Sierra are more... I don't know, tight? in many ways, they brought many things to a new level, so a flawless base for installation is necessary. If this routines for repairing index, permissions and the rest doesn`t suits to the troubled users, I recommend partitioning the hard disk, moving all essentials documents on the non-system partition and proceding to a clean install. It may imply a bit much work, having to reinstall back all applications, but its just a matter of hours - less then spending days riding around the internet and chasing for smart solutions.