Downloaded apps will not finish their installation
I hadn't used the App Store in about a month until yesterday after I installed Mountain Lion, so I can't know for sure whether this would have occured in the month before the upgrade. I cannot get *any* application to install and as soon as one of the apps in question finish downloading a dialog explaining that the app failed to download and to try again from the purchases page (which also doesn't work).
I've restarted, deleted the App Store cache folder, deleted the App Store cookies, and scoured the internet for a solution.
If anyone can figure out where this problem came from I would be extraordinarily grateful.
Thanks!
Nik
Message was edited by: nikmyers [Added second screenshot]