Can't update apps in App Store because apps are "Not signed by Apple"

My app store shows that I have 8 Apps to be updated but every time I try I get this message. "Failed to verify the preflight file. It is not signed by Apple."
Any one have any ideas?

Open System Preferences > Security & Privacy then select the General tab.
Select Anywhere under: Allow apps downloaded from:
If that area is grayed out, click the padlock icon to make changes.

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Fatlozza wrote:
can't update apps on my iPhone 4s cos it says my daughter's Apple ID password is required:
Anything Downloaded with a Particular Apple ID is tied to that Apple ID and Cannot be Merged or Transferred to a Different Apple ID
Apple ID FAQs > http://support.apple.com/kb/HT5622

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Hello Panthercat222,
Thanks for using Apple Support Communities.
To troubleshoot this issue where you are unable to connect to the iTunes Store please follow the steps below.
Troubleshoot issues on an iPhone, iPad, or iPod touch
If you haven't been able to connect to the iTunes Store:
Make sure your date, time, and time zone are correct in Settings > General > Date & Time.
Note: Time Zone may list another city in your time zone.
Make sure that your iOS software is up to date by tapping Settings > General > Software Update (iOS 5 or later) or connecting your iOS device to iTunes and clicking Check for Update on your device's Summary page.
Check and verify that you're in range of a Wi-Fi router or base station. If you're on a device with cellular service, make sure that cellular data is turned on from Settings > General > Cellular.
Note: If connected to cellular data, larger items may not download. You may need to connect to Wi-Fi to download apps, videos, and podcasts.
Make sure that you have an active Internet connection. You can check the user guide for your device for help with connecting to the Internet.
Make sure that other devices (portable computers, for example) are able to connect to the Wi-Fi network and access the Internet.
Try resetting (turning off and then on again) your Wi-Fi router.
If the issue persists, try troubleshooting your Wi-Fi networks and connections.
Can't connect to the iTunes Store
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Alex H.

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Ok, so for about 4 years I have been using my husbands apple id on my Mac and iPhone...now with Family Sharing I'm trying to switch both my Mac and iPhone over to my apple id. The problem is that the apps that were bought with my husbands id will not update on either of my devices. What's up, I thought the Family Sharing meant that I could download purchased apps from his account. Ideas?

13Kingdoms wrote:
Apparently I have some songs in my iTunes library that I purchased with an old Apple ID.
You should have simply updated your AppleID rather than creating a new one.
They won't play on my new computer, because they're not authorized to. But that old ID is connected to an email address that doesn't even exist anymore? I have no idea what the password was.
Go here -> https://iforgot.apple.com/appleid

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HumaidG wrote:
is there a way i can update without having to delete the app and install new one using my new ID?
No.
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See iTem 5 Here > http://support.apple.com/kb/HT5622

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please help, thank you!

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Can't update apps in App Store because apps are "Not signed by Apple"

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