Previous 1 2 Next 18 Replies Latest reply: Nov 3, 2015 3:35 AM by LindaClaudine
pninan Level 1 (0 points)

I upgraded my OS X to Mavericks and the install was very smooth. Since then, however, I cannot update any apps or purchase new ones in the App Store. I receive a message saying "Failed to verify the preflight file. It is not signed by Apple. The application will be available from the Purchases page." Unfortunately the same thing happens when I use the Purchases page as well.


Am I doing something wrong or did something break with App Store after my installation?

MacBook Pro (Retina, 13-inch, Late 2012), OS X Mavericks (10.9)
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