HT203604: Mac App Store: Cannot update App Store purchases or updates do not seem available

Learn about Mac App Store: Cannot update App Store purchases or updates do not seem available
SpeedyYang

Q: Updates available

There are some updates in App Store. But when I click update button, it shows me the following message "The product distribution file could not be verified. It may be damaged or was not signed."

MacBook Pro with Retina display, OS X El Capitan (10.11)

Posted on Oct 18, 2015 7:42 AM