I can never use most Apple-made apps on my MacBook Pro with Retina display, as the UI never responds, however Mail gets new emails and Preview displays images. It's just that I cannot click.
I can't close it and I can't use the menu bar, however it responds to keyboard commands.
I have to force quit these apps every single time. I don't have the 'reopen windows' option on, so I don't understand what is going on. Activity Monitor is normal.