2015-04-25 OS X
It may happen that after you started downloading an application from App Store, the whole process will be interrupted by a broken internet connection or any other situation that can occur. In this case, application which hasn’t been correctly downloaded or updated will be marked with an error on the list.
Any attempt to re-download corrupted application may fail. To fix this issue all we have to do is to delete entire App Store cache that is stored on our hard drive.
Open Terminal – press ⌘ Space
and when Spotlight will appear start typing Terminal
Once it’s opened, type
New Finder window will appear.
Now find directory called
You can safely delete entire directory. It will be recreated next time you open App Store. Now you should be able to re-download corrupted file.