'Verifying ~~~.app' when I run some specific applications
I met some strange problem I've never experienced.
When I started the 'Civilization V: Campaign Edition' which was downloaded from the Mac App Store, the dialog with the upper image was shown up.
Few hours ago, this applications works pretty well, but now, it's not.
Have you ever experienced this problem with any kinds of applications you use?
If so, do you have the solution for this problem?
Mac mini, OS X Yosemite (10.10)