Mac OS X 10.11 - Incomplete Download from App Store

Mac OS X 10.11 - Incomplete Download from App Store
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I had not faced this circumstance in Yosemite before upgrading to El Capitan OS X 10.11.
It seems the app downloading never be completed. What I have? only the App icon and Wating status in Launchpad. What should I do? Need your experiences.
Thanks

This happens on all Mac OS X Versions, not only 10.11 bro. I do not know the reason why, but the following solution works on every one.

From Launchpad window, click and hold constantly on the App waiting icon until the X comes up. Just click on the X to delete the incomplete app download, then go back the App Store to re-download the app again.