Forcing an app to open a file!
On a Mac, files can easily be opened by dragging the file to the app in the Dock. The application will then run and open the file. Sometimes however, the apps won't become highlighted when you bring the file over it and it will refuse to open. This happens when the file is supposedly not supported by this app. This is not always true and it happened to me many times with VLC. The video file ran great but VLC didn't recognize it as supported at first. A cool fix exists however, when you drag an unsupported file, you simply have to push "Command-Alt" and boom the icon becomes highlighted and it will force the app to try opening the desired file. It worked with every application I tried it with.