Recently my video output to my second screen stopped working, so I figured I'd delete the preferences as I always used to do. However, when I go into Library>Preferences, they aren't there and I don't know how to get my output to work again.
Update: Disregard this post. Preferences had nothing to do with the problem. I just had to go to VIEW > EXTERNAL VIDEO and change it from OFF to ALL FRAMES. Stupid mistake on my part. Sorry to waste space on here.