Hi there. I'm a new Mac owner and I think I've inadvertently screwed something up. I can't remove the Dock icon from the dock. When I drag it to the desktop or trashcan, it stays there. When I try to hide it or force quit, it stays there. I've tried deleting plist files and updating permission changes and pretty much everything I could find from many hours of Googling. Please help me out! Please enjoy my lovely picture of what I'm trying to close.