When ever i'm trying to install an app from the app store i'm getting the following error "We could not complete your purchase - The product distribution file could not be verified. It may be damaged or was not signed", plz help me to rectify this .

when ever i'm tring to install an app from the app store i'm getting the following error.
"We could not complete your purchase - The product distribution file could not be verified. It may be damaged or was not signed".
someone plz help me to overcome this.

Installing the appropriate combo update may help...
If you are running v10..7 Lion, install the OS X Lion Update 10.7.4 (Client Combo)
For 10.6 Snow Leopard > Mac OS X 10.6.8 Update Combo
Then restart your Mac. Try the App Store.
If that doesn't help, try the following..
Quit the App Store if it's open.
Open the Finder. From the Finder menu bar top of your screen click Go > Go to Folder
Type this exactly as you see it here:
/Library/Preferences/SystemConfiguration
Click Go
Move the NetworkInterfaces.plist file from the SystemConfiguration folder to the Trash.
Relaunch the App Store and try downloading Mountain Lion.
You may also need to disable anti virus software and turn off the Firewall in System Preferences > Security (or Security & Privacy) > Firewall

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Trying to log into App store and keep getting "An unknown error has occured" please help

I keep trying to log into the App store and get "An unknown error has occured" help!!

Im having the same issue cant purchase anything. must be down

I am trying to buy Mountain Lion but I am getting this message: The product distribution file could not be verified. It may be damaged or was not signed.

I just tried to buy Mountain Lion but I am getting this message, yes, even after I reboot: The product distribution file could not be verified. It may be damaged or was not signed.
I don't understand what this means? Is my MacBookPro too old to work with Mountain Lion?

The Apple Support Communities are an international user to user technical support forum. As a man from Mexico my first language is Spanish. I do not speak English, however I do write in English with the aid of the Mac OS X spelling and grammar checks. I also live in a culture perhaps very very different from your own. When offering advice in the ASC, my comments are not meant to be anything more than helpful and certainly not to be taken as insults.
Always search the forum before posting. This is asked at least three times just below your post.
https://discussions.apple.com/thread/3604789?tstart=0
https://discussions.apple.com/thread/4153268?tstart=0

I cannot download OS X Mountain Lion, I get an error message that says: "We could not complete your purchase. The product distribution file could not be verified. It may be damaged or was not signed." Why am I receiving this message?

I cannot download OS X Mountain Lion, I get an error message that says: "We could not complete your purchase. The product distribution file could not be verified. It may be damaged or was not signed." Why am I receiving this message?

Servers may be overloaded.
One user reported:
Deleted file com.apple.appstore in /var/folders/, dissabled VirusBarrier X6: problem solved!

HT201364 trying to download os x mavericks and i get an error saying "The product distribution file could not be verified. It may be damaged or was not signed." how do i fix this so i can update my new macbook pro?

"The product distribution file could not be verified. It may be damaged or was not signed."
please help! i want to update my computer!!!

"Update your new MacBook Pro"?
Well, if your MacBook Pro is new, it already has Mavericks installed and there is nothing to update.
Go to the Menu Bar, and click the Apple logo. Then click "About This Mac." Does it show OS X 10.9 or 10.9.1?
If so you are already running Mavericks.

Receiving "The product distribution file could not be verified. It may be damaged or was not signed" at my home network. But not at my office network

Hi,
I've recently updated my late 2009 macbook from Snow Leopard to Mountain Lion. Things were working good. Yesterday I updated in to 10.8.4. Today I saw an update for Xcode. I tried installing it. But I have been constantly receiving "The product distribution file could not be verified. It may be damaged or was not signed" in App Store. There after I am not able to purchase anything from App Store. I tried following things:
1. Tried downloading the updates in Safe Mode. ==> No success.
2. I deleted folder present in /var/folders ==> No success.
3. I changed my network by converting my phone to WiFi hotspot and I stopped receiving the error.
Can somebody please suggest any reason/solution?
Router I am using is D-Link N300.
Thanks.

The problem got solved by changing DNS to public DNS from Google. i.e. 8.8.8.8 and 8.8.4.4.
Thanks

HT1338 The Mac App Store shows an update available for iMovie but when I click "update" it gives me this message, "The product distribution file could not be verified. It may be damaged or was not signed." What can I do to update this program?

The Mac App Store shows an update available for iMovie but when I click "update" it gives me this message, "The product distribution file could not be verified. It may be damaged or was not signed." What can I do to update this program?

http://www.apple.com/support/mac/app-store/contact.html?form=account

HT4414 When I try to purchase Mountain Lion i get an error message: "We could not complete your purchase. The product distribution file could not be verified. It may be damaged or was not signed." I can purchase other apps, why not Mountain Lion?

When I try to purchase Mountain Lion i get an error message: "We could not complete your purchase. The product distribution file could not be verified. It may be damaged or was not signed."
I can purchase other apps, why not Mountain Lion. I get the same message on my wife's IMAC.

The only thing that worked for me was to boot in safe mode.
Power down. Then press power button and hold 'shift' key until grey screen with progress bar appears... Once booted and logged in just open safari and browse to applestore.
No trouble at all once I did this.
Hope it helps.

I purchased the mountain lion and while downloading an error message appear :The product distribution file could not be verified. It may be damaged or was not signed. what i've to do to complete downloading??

please help me coz i'm anew mac user and i don't have much knowledge about mac system

how can i skip his error ( The product distribution file could not be verified. It may be damaged or was not signe )
because it's driving me crazy

I tried downloading the latest OS X Mountain Lion and [after a long time... I have a slow connection] I got an error message ... The product distribution file could not be verified. It may be damaged or was not signed.

Hi folks,
I tried downloading the latest OS X Mountain Lion and [after a long time... I have a slow connection] I got an error message ... We could not complete your purchase The product distribution file could not be verified. It may be damaged or was not signed.
Everytime I retry or continue the download I just keep getting the same error message!!!
What can I do to get my product?
PM

The only thing that worked for me was to boot in safe mode.
Power down. Then press power button and hold 'shift' key until grey screen with progress bar appears... Once booted and logged in just open safari and browse to applestore.
No trouble at all once I did this.
Reminder: create full backup before you upgrade OS
Hope it helps.

Download failed and receive the following message: The product distribution file could not be verified. It may be damaged or was not signed.

download failed due to internet problems. I can't restart the download again and receive the following message: The product distribution file could not be verified. It may be damaged or was not signed. please help thanks

I went to Purchases and it worked from there having had the same problem you describe.

I try to download the OS X Mountain Lion, and I keep getting an error saying, "The product distribution file could not be verified. It may be damaged or was not signed." Please Help!

I try to download the OS X Mountain Lion, and I keep getting an error saying, "The product distribution file could not be verified. It may be damaged or was not signed." Please Help!

If you have Intego VirusBarrier X6 installed
1. Open /Applications/VirusBarrier X6.
2. Click on the "Surf" button.
3. Click on the "Ad Banner Filter" tab.
4. Click "OFF" next to "Banner advertisement filter".
5. Start the computer in Safe Boot, then restart the computer into normal mode.
If don't not have Intego Virus Barrier installed
1. Verify that the date and time is correct on the computer.
2. Safe Boot once, then restart normally, then try downloading again.
3. Try with a different user account if the issue persists
If the issue persists
Install Lion onto an empty partition (internal or external).
Note: You can Use Disk Utility to live partition the internal drive and create a second partition large enough to install Lion.
Start from the clean installation of Lion.
Download Mountain Lion from the Mac App Store. Note that the original startup disk can be set as the destination for Mountain Lion during the installation process.

Hi, every time I attempt to purchase OXS Mountain Lion I get a message that says unable to complete your purchase because "The product distribution file could not be verified. It may be damaged or was not signed." Any idea what I am doing wrong, cheers.

Hi, every time I attempt to purchase OXS Mountain Lion I get a message that says unable to complete your purchase because "The product distribution file could not be verified. It may be damaged or was not signed." Any idea what I am doing wrong, cheers.

Welcome to Apple Support Communities
Press Shift key on boot and purchase OS X 10.8

Buy Mountain Lion: The product distribution file could not be verified. It may be damaged or was not signed.

Hi community,
When trying to buy Mountain Lion I get: "The product distribution file could not be verified. It may be damaged or was not signed.”, any clue on how to fix this issue? It only happens in one of my computers.
In the console I get an error when trying to purchase it:
7/26/12 9:50:34.387 PM App Store: FRPurchaseManager: Preflight operation for 537386512 failed with error: Error Domain=com.apple.appstore Code=0 "The product distribution file could not be verified. It may be damaged or was not signed." UserInfo=0x7fde9bc452a0 {NSLocalizedFailureReason=Cannot create PKProduct from "file://localhost/var/folders/8l/ndt85j717d3_k8gr6ztmljdc0000gn/C/com.apple.app store/537386512/preflight.pfpkg" Error Domain=NSURLErrorDomain Code=-1100 "The requested URL was not found on this server." UserInfo=0x7fde9bc43b50 {NSUnderlyingError=0x7fde9bc42e60 "The requested URL was not found on this server.", NSErrorFailingURLStringKey=file:///var/folders/8l/ndt85j717d3_k8gr6ztmljdc0000g n/C/com.apple.appstore/537386512/preflight.pfpkg/index.sproduct, NSErrorFailingURLKey=file:///var/folders/8l/ndt85j717d3_k8gr6ztmljdc0000gn/C/co m.apple.appstore/537386512/preflight.pfpkg/index.sproduct, NSLocalizedDescription=The requested URL was not found on this server.}, NSLocalizedDescription=The product distribution file could not be verified. It may be damaged or was not signed., NSUnderlyingError=0x7fde9bc442b0 "The requested URL was not found on this server."}
1) I deleted the /var/folders/8l folder (gets recreated when opening the app), no result.
2) Tried to check "Best attempt" for both OCSP and CRL certificate management in Key Chain.
No result in any way.
Any idea?

Hello
It can be an issue related to antivirus so disable it or download in safe mode
regards

I tried to download Mavericks overnight and it never finished. When I tried to download again I got this message "We could not complete your purchase.The product distribution file could not be verified. It may be damaged or was not signed." Help?

I tried to re-download Mavericks after an apparent failed attempt and now I get the message "We could not complete your purchase. The product distribution file could not be verified. It may be damaged or was not signed."
Can anybody help?

Several causes for this problem have been reported. Please take each of the following steps that you haven't already tried. Stop when it's resolved.
Step 1
Back up all data.
From the menu bar, select
 ▹ System Preferences... ▹ Network
If the preference pane is locked, click the lock icon in the lower left corner and enter your password to unlock it. Then click the Advanced button and select the Proxies tab. If any proxy options are selected, make a note of them and then deselect them. You don’t need to change the bypass or FTP settings. Click OK and then Apply. Test. The result may be that you can't connect to any web server. Restore the previous settings if that happens.
Step 2
Rebuild the Spotlight index. If you try to search now from the magnifying-glass icon in the top right corner of the display, there will be an indication that indexing is in progress.
Step 3
Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you boot, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal boot may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

When ever i'm trying to install an app from the app store i'm getting the following error "We could not complete your purchase - The product distribution file could not be verified. It may be damaged or was not signed", plz help me to rectify this .

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