Overview: Today in this post we will troubleshoot error “The product distribution file could not be verified. It may be damaged or was not signed”. Many Mac Mojave users are facing this error message while downloading or updating the apps from the App Store.
Let’s Start with Few Practical Scenarios
Scenario 1: “The product distribution file could not be verified. It may be damaged or was not signed.”
I have been getting this message on my old MacBook Pro, my new Macbook, and my medium-age iMac, since January. I see that people have been getting this since 2012, but not recently. I tried the fix on CNET.com and deleted my com.applestore.something folder, but that didn’t fix it. I can’t download updates, essentially. Usually, it fixes itself overnight, so if I just come back in the morning the updates have installed themselves, but since January 25 that hasn’t worked either; updates won’t install. If I click “update” it sits there for a while and then doesn’t, and if I try again I get this message.
Source: Apple Forum
Scenario 2: The product distribution file could not be verified. It may be damaged or was not signed.
“We could not complete your update. The product distribution file could not be verified. It may be damaged or was not signed.” I have encountered this problem during an update on App Store, (updating iMovie, Xcode…etc) It prompts when I was clicking “update”. It didn’t help even restarted it on safe-mode and with NVRAM cleared. Could anyone tell me what to do? Thanks
Source: Apple Forum
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Like the above two users, there are multiple Mojave users who are receiving an error “We could not complete your update. The product distribution file could not be verified. It may be damaged or was not signed.” Let’s go ahead and fix this.
Restart Your Mac
Most of the time simple restart fixes the issue. Click on Restart from the Apple Menu and try updating or downloading the apps from App Store.
Update Your Mac
To download macOS software updates, go to the Apple menu and select System Preferences and then click on Software Update.
You can also select Apple menu, choose About This Mac and then click on Software Update.
Reset Apple ID password
- Go to Apple menu and select System Preferences and then click on iCloud.
- Select Account Details.
- Click on Forgot Apple ID or password and follow the onscreen instructions.
- Click on Security and then Reset Password.
Fix Issue with the Connectivity
Make sure you are not facing internet connectivity issue, try using an ethernet connection to connect, also try changing the network or use hotspot to connect and then try updating or downloading the apps.
Delete App Store Plist file
Select Go to Folder from the Finder’s Go menu and enter this path ~/Library/Cookies/ and move the below-mentioned files to the Trash:
Now reboot Mac and try updating or downloading the app once again from App Store.
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Delete App Store Cache
Select Go to Folder from the Finder’s Go menu and enter this path ~/Library/Caches/com.apple.appstore/Cache.db and move the below-mentioned file to the Trash:
Now reboot Mac and try updating or downloading the app once again from the App Store.
Start Mac in Safe Mode
- Shut down your Mac.
- Now start your Mac and immediately Press and hold the Shift key as soon as the start-up sound is heard.
- Release the Shift key when you see the Apple logo. Safe Boot appears on the macOS Mojave start-up screen.
Once in safe mode try updating or downloading the apps from App Store, to go back to the normal mode restart the system normally without holding any keys.
Create Another Account on Mac
- Go to the Apple menu, select System Preferences and then click on Users & Groups.
- Click on the lock icon to unlock it, put your administrator name and password.
- Now click on Add or Plus icon to create new account
- Click the New Account pop-up menu and then choose a type of user i.e. Administrator or Standard user and put all the necessary details and Click on Create User.
Now try updating or downloading the apps from the App Store.
Perform Clean Installation of macOS Mojave from USB flash drive
In case none of these steps works then performing a clean installation may help you to fix error “The Product Distribution File Could Not Be Verified”. Please note that you will lose all your data on the Mac. Visit this link to perform the clean installation: Apple link How to create a bootable installer for macOS
Wrap Things Up
I hope this article helped you to fix an Error ” The Product Distribution File Could Not Be Verified ” on macOS Mojave.