HT201364 I keep getting the message "The product distribution file could not be verified. It may be damaged or was not signed." Does anyone know what I can do to correct this so I can download OSX?

I keep getting the message "The product distribution file could not be verified. It may be damaged or was not signed." Does anyone know what I can do to correct this so I can download OSX?
I have a MacBook Pro with all the necessary requirements.

Here are a few things to try:
Restart your Modem and Router.
Reset iTunes Store Cache (iTunes Preferences, Advanced tabl)
Delete the App Store plists (close App Store first):
~/Library/Preferences/com.apple.appstore.plist
~/Library/Preferences/com.apple.storeagent.plist
To get to these,iIf you still have your user Library hidden, hold down the Option key and select Library from the Go menu in Finder. Otherwise, just go into your home folder, then Library, and then Preferences.

Similar Messages

HT4463 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

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.

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.

File and product distribution could not be verified. it may be damaged or was not signed. ?

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.

HT2476 After updating to OS X Mountain Lion, there is a password locked pdf document in the Downloads Stack. Does anyone know what password is required to access this file?

After updating to OS X Mountain Lion, there is a password locked pdf document in the Downloads Stack. Does anyone know what password is required to access this file?

Hello, if your install disk is locked (I assume with FileVault) there is no way to change the password. If it weren't locked there were at least two solutions. As far as I know, the only solutions now are:
- contact your dad
- erase and reinstall the OS X clean
Let us know.

HT3275 Time machine cannot backup due to "The backup disk image "/Volume/Data/Dave's Macbook Pro."sparse bundle" is already in use." Does anyone know what this means and how to fix it??

My time machine is sending me a message; "The backup disk image "/Volume/Data/Dave's Macbook Pro "sparse bundle" is already in use". As a result, the time machine cannot complete a backup. Any suggestions?

Look at the more like this column on the right.. this is the most common problem reported here.
You need to restart the TC.. that is all..
Pull out the power cord.. count to 10.. plug in power cord.
There are a few occasions where this fails.. see C12 http://pondini.org/TM/Troubleshooting.html

Every time I try to download a game onto my phone, there's a pop-up which reads "the item requested is not available in your country" or something along those lines. Does anyone know what the problem is and how I can fix it?

I can download games onto my iphone 5 cause it says the items are not available in my country (south Africa) is there something I can do?

Other than moving to a country where the apps you want are available, there is no fix.

HT201364 when i tried to update OS X Mavericks, its says The product distribution file could br verified. it may be damaged or was not signed... please help me..

^^
<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.

Cannot download Maverick. Message I receive is The product distribution file could not be verified. It may be damaged or was not signed. Can anyone help?

Cannot download Maverick. Get message that production distribution file could not be verified. It may be damageed or was not signed. Can anyone help?

Mavericks installer can’t be verified
Mavericks Installer can’t be verified (2)

Mountain Lion will not download says The product distribution file could not be verified. It may be damaged or was not signed." Help....

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.

My comp out of nowhere just said it was infected by a virus and it downloaded a scan app and told me i had to register it for it to work and there is a $20 registration charge. does anyone know whats going on?

my comp out of nowhere just said it was infected by a virus and it downloaded a scan app and told me i had to register it for it to work and there is a $20 registration charge. does anyone know whats going on?

Look over this link....
http://www.reedcorner.net/guides/macvirus/
It will catch you up to speed with what is going on and the solution.....DO NOT REGISTER.....

HT201364 Can someone help out. I'm getting this message when i try to download. The product distribution file could not be verified. It may be damaged or was not signed.

Can someone help out. I'm getting this message when i try to download. The product distribution file could not be verified. It may be damaged or was not signed.

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

HT201364 The product distribution file could not be verified. It may be damaged or was not signed. I get this message when I try to download mavericks. can anybody help?

I have a 2011 macbook pro 13 inch. when I try to download mavericks I get a message saying the product distribution file could not be verified. It may be damaged or missing. Please help.

Mavericks installer can’t be verified

HT201364 I have tried to download OS X Maverick on to my MacBook Pro. Here the error message I received "the product distribution file could not be verified. It must be damaged or was not signed. Can I still used the computer for others projects?

How can this error be corrected? "The product distribution file could not be vverified. It must be damaged or was not signed. So can this error be repaired? I have read good things about this updated software. I really looking forward to enjoying the benefits of using OS X Mavrick softtware in my daily life.
Another question can I operate laptop with other project while it is downloading?
Thanks,
Otis A. Drakeford

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, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. 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 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.

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.

HT201364 I keep getting the message "The product distribution file could not be verified. It may be damaged or was not signed." Does anyone know what I can do to correct this so I can download OSX?

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