Product distribution file could not be verified. it may be damaged or was not signed.??
whenever i try downloading anything on the appstore that's what it says.. i don't know what to do... i'm no expert on computer and i can only understand basic instructions. english is not my first language.. can anyone please help me??
all the other similar threads about this that i saw were from 2011 and i did not find them very helpful that's why i am asking this.. please 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
If possible, test on another network, such as a public hotspot (if the computer is portable) or the hotspot created by a mobile device. A network gateway that blocks some traffic, most likely on a company or university network, could be causing the error.
Step 2
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 3
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 4
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 turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start 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 startup 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, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.
Similar Messages
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When clicking 'buy' for Mountain Lion in the App store I get the message "product distribution file could not be verified, it may be damaged or was not signed' Anybody know why I get this message. Thanks
Make sure your Mac qualifies for Mountain Lion > Upgrade your Mac to OS X Mountain Lion.
If you have anti virus software installed, disable that before downloading apps.
Turn off the Firewall in System Preferences > Security (or Security & Privacy) > Firewall
Try deleting the cache, cookies, and preference files (plist) associated with the App Store.
Quit the App Store if it's open.
Open the Finder. From the Finder menu bar click Go > Go to Folder
Type this exactly as you see it here:
~/Library/Caches/com.apple.appstore/Cache.db
Click Go
Move the Cache.db file to the Trash.
Now here:
~/Library/Preferences
Click Go
Move these files from the Preferences folder to the Trash.
com.apple.appstore.plist
com.apple.storeagent.pllist
Now here:
~/Library/Cookies
Click Go
Move the com.apple.appstore.plist file from the Cookies folder to the Trash.
Empty the Trash, try the App Store. -
I get this as a pop up when I try to purchase and install "Pages" and "Numbers" on my brothers iMac. Thoughts as to what I might be doing wrong?
Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in 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 (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test. -
^^
<Email Edited by Host>Somehow, the download is getting corrupted. First, try repairing your hard drive. Then make sure that you have disabled or uninstalled any anti-virus or internet filtering software. Also, verify that your computer's clock is set properly.
After doing all this, try downloading again. It may be worthwhile to download on a completely different network, especially since that will be the next step if re-downloading on your current network doesn't work.
PS - note that folks won't send you an e-mail directly from these forums, and posting your e-mail address on a public forum is generally not a good idea. -
Mountain Lion cannot download, need help. Says "The product distribution file could not be identified it may be damaged or was not signed". What do I do?????
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. -
I can't update IPhoto, it says "the product distribution file could not be verified it must be damaged or signed in" I bought it on iTunes and have 8,000 photos already. how can I update and correct this??
You might try resetting the App Store application and clear the cookies via this menu:
as described in this website: Make use of the Mac App Store debug menu | MacFixIt - CNET Reviews
OT -
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 -
Hi:all
I can't download an app or update ,It says ( the product distribution file could not be verified) in App Store
,and in iTunes says An unknown error occurred (-50) ?
Help Please.See this link from another similar question. It may need patience to resolve. I think Thomas Reed's suggestion is best place to start.
App Store rejects buy of Mountain Lion: Apple Support Communities -
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! -
"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. -
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 -
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 -
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
-
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. -
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
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