Whenever I try to update my iPhoto program I get this error message "The product distribution file could not be verified. It may be damaged or was not signed."

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, or by a peripheral device.
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, 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 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.

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Mavericks Update - Error message - The product distribution file could not be verified

Help!
Trying to download mavericks (from 10.7.5) as I have just had a new hard disk isntalled and need to start from scratch.
Wanting to re download iphoto but I can't as I need a newer OS so trying to download mavericks from the app store. My internet is very slow and keeps cutting out so I have tried a few times but it's not working.
Now I'm getting an error message - 'the product distribution fil could not be verified'
If anyone can help that would be great.
Or even let me know where I can get a copy of iphoto to suit OS 10.7.5 so I don't need to download a whole new OS.

You're trying to download a 5 GB file. If your Internet connection is lousy, you won't have much success. Try another network.

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.

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.

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

Updating compressor fails with "The product distribution file could not be verified. It may be damaged or was not signed."

The message appears in the App Store page. App Store support suggested removing Compressor and reinstalling it. Trying to reinstall produced the same message: "The product distribution file could not be verified. It may be damaged or was not signed." And compressor disaappeared from my "purchased" list. Trying the purchase route, i get the same message. The App Store support guy said to try here since he and his superviosr had no idea what to do.

Posting this triggered a suggestion in the "More like this" that solved the problem. In
https://discussions.apple.com/message/16063398#16063398%2316063398 the third response gives effective guidance for fixing the problem.

Can't download itunes update. Keep getting this error message: THe program can't start because MSVCR80.dll is missing from your computer. Try reinstalling the program to fix this problem

Can't download itunes update. Keep getting this error message: THe program can't start because MSVCR80.dll is missing from your computer. Try reinstalling the program to fix this problem

I researched the advice on the link provided by b noir as well as very similar advice from apple support: http://support.apple.com/kb/TS5376. It worked for me (for now).
Some things of note:
I did all of the things requested by the link I provided
My computer WOULD NOT uninstall Apple Mobile Device Support. I had to manually remove the folder (also as instructed by the url)
I also uninstalled MobileMe. Was a little different than removing the other apps. Follow instructs provided here: http://support.apple.com/kb/HT2992
I did not uninstall iCloud
I have to admit it was a bit scary removing all those things. Is important to note that when re-installing Apple, follow steps to do so as Administrator (the right-click thingy and whatnot).
Hope this helps!

HT1926 when i try to install update i get this error message the feature you are trying to use is on a network resource that is unavailable any ideas

every time i try to update itunes i get this error message The feature you are trying to use is on a network resource that is unavailable then asks me to find the folder containing the instalation package ITunes.msi

(1) Download the Windows Installer CleanUp utility installer file (msicuu2.exe) from the following Major Geeks page (use one of the links under the "DOWNLOAD LOCATIONS" thingy on the Major Geeks page):
http://majorgeeks.com/download.php?det=4459
(2) Doubleclick the msicuu2.exe file and follow the prompts to install the Windows Installer CleanUp utility. (If you're on a Windows Vista or Windows 7 system and you get a Code 800A0046 error message when doubleclicking the msicuu2.exe file, try instead right-clicking on the msicuu2.exe file and selecting "Run as administrator".)
(3) In your Start menu click All Programs and then click Windows Install Clean Up. The Windows Installer CleanUp utility window appears, listing software that is currently installed on your computer.
(4) In the list of programs that appears in CleanUp, select any iTunes entries and click "Remove", as per the following screenshot:
(5) Quit out of CleanUp, restart the PC and try another iTunes install. Does it go through properly this time?

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??

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 updating to iTunes 10.7 on my pc and when I try to launch it I get this error message-The procedure entry point AVCFPlayerSetDirect3DDevice could not be located in the dynamic library AVFoundationCF.dll. Any Ideas?

I just tried updating to iTunes 10.7 and when I try to launch it I get this error message-The procedure entry point AVCFPlayerSetDirect3DDevice could not be located in the dynamic library AVFoundationCF.dll. Them it tells me to re-install iTunes and the same thing happens again. Any Ideas?

Taken at face value, you're having trouble with an Apple Application Support program file there. (Apple Application Support is where single copies of program files used by multiple different Apple programs are kept.)
Let's try something relatively simple first. Restart the PC. If you're using Vista or 7, now head into your Uninstall a program control panel, select "Apple Application Support" and then click "Repair". If you're using XP, head into your Add or Remove Programs control panel, select "Apple Application Support", click "Change" and then click "Repair".
If no joy after that, try the more rigorous uninstall/reinstall procedure from the following post. (If you've got XP, although the procedure is for Vista and 7, just read "Computer" as "My Computer", read "Uninstall a program control panel" as "Add or Remove programs control panel" and assume the system is 32-bit, and you'll be doing the right things.)
Re: I recently updated to vista service pack 2 and I updated to itunes 10.2.1 and ever

HT5290 When I try to update software such as pages, etc. this error message comes up: There was an error in the App Store. Please try again later. (20)

When trying to download updates for Pages etc, I get this error message: There was an error in the App Store. Please try again later. (20)

Hello almauck,
Thank you for the details of the issue you are experiencing when trying to update Pages on my iMac.
I recommend signing out of the App Store and signing back in and then trying the update again:
Sign out
Choose Store > Sign Out.
Sign in using an Apple ID
Choose Store > Sign In, or click Sign In in the Quick Links section. The Quick Links section is located in the right part of the window shown when you click Featured, Top Charts, or Categories in the toolbar.
Enter your Apple ID and password, and then click Sign In.
Mac App Store: Sign in and out
http://support.apple.com/kb/PH11499
Thank you for using Apple Support Communities.
Best,
Sheila M.

When I try to update my iPod Touch, I get an error message regarding my network connection, and it will not update. Any suggestions?

When I try to update my iPod Touch, I get an error message saying "The iPod Software update server could not be contacted. Make sure your network settings are correct and your network connection is active, or try again later." Has anyone else had that and how do you end up updating your iPod?

Update Server
Try:
- Powering off and then back on your router.
- iTunes for Windows: iTunes cannot contact the iPhone, iPad, or iPod software update server
- Change the DNS to either Google's or Open DNS servers
Public DNS — Google Developers
OpenDNS IP Addresses
- For one user uninstalling/reinstalling iTunes resolved the problem
- Try on another computer/network
- Wait if it is an Apple problem

When I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and wont be installed. I use Windows 7.

Everytime I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and can't be installed? I have tried to install it two times and get the same message each time. Any solutions to my problem?? Those who have installed ITUNES 11 is it hard to work with? maybe im lucky it wont update?? I don't know.

That suggests that the installer is getting damaged during the download.
I'd first try downloading an installer from the Apple website using a different web browser:
http://www.apple.com/itunes/download/
If you use Firefox instead of IE for the download (or vice versa), do you get a working installer?

Hello, Whenever I try to download Premier Pro CC I get an error message to close (CEPHtmlEngine, CEPHtmlEngine Helper). However, all my applications are closed except for Creative Cloud.

Hello, Whenever I try to download Premier Pro CC I get an error message to close (CEPHtmlEngine, CEPHtmlEngine Helper). However, all my applications are closed except for Creative Cloud.

Terminate the processes in task manager/ activity monitor.
Mylenium

I have the current version of itunes, but when I go to update my ipod, I am getting an error message that says that it could not back up because the backup was corrupt or not compatible with the iPod. This is the first time trying to backup.

I have the current version of itunes, but when I go to update my ipod, I am getting an error message that says that it could not back up because the backup was corrupt or not compatible with the iPod. This is the first time trying to backup the iPod. I have authorized my computer. Still no luck.

Go to iTunes>Preferences>Devices and select the iPod backjp and click on delete and try again.
Also
- Reboot the computer
- Try another cable
- Try another USB port

Whenever I try to update my iPhoto program I get this error message "The product distribution file could not be verified. It may be damaged or was not signed."

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