Mac OS X,  Mass Deployment

Enable the Debug Menu in the Mac App Store

The Mac App Store has a debug menu. To enable the debug menu, enable the ShowDebugMenu key in com.apple.appstore. To do so:
defaults write com.apple.appstore ShowDebugMenu -boolean YES
Once enabled, there are a number of options to show the folder where apps download, enable logging, clear cookies and reset the Mac App Store.
To turn the Mac App Store debug menu back off:
defaults write com.apple.appstore ShowDebugMenu -boolean NO