Long story short, i want to delete some files on my mac.. Games, apps and some other things. i.e. I want to delete the game Left 4 dead 2, but when i drag the icon for the game to the trash can it doesnt go in and returns back to where it was, that the same for a few other apps aswell. When i click and hold on the app icons and they start to shake the 'X' doesnt appear for these apps either. Any ideas?