So, I'm an idiot. A really big idiot. I was messing around in the Terminal and accessed root [sudo -s] I assumed root access would end upon closing the terminal, but I guess not. I can see all my hidden files (e.g., mach_kernal). How do I disable root and get back to not being able to see my hidden files? I've learned my lesson - never mess around with things you don't understand. Thanks for your help!