On a macbook 13" late 2011, running 10.8.5 Help! I've scoured the web, and can't find an answer. Holding down the power button doesn't work, regular shutdown won't work, nothing except Firefox is working or even launching - not even preview or notes. I can't empty Trash, not even using Opt+secure delete. I can't get into Finder now. Immediately prior to these problems starting I attempted to launch Skype which had updated in the previous session. Skype was the first thing not to launch How long before Firefox dies too? Rhetorical question. Would it be destructive to disconnect the battery while the computer's on? Because that's the only way I can think of to force a shut down now. I have a spare hard drive with Snow Leopard installed... and a time machine back up. I don't have enough knowledge to play with Terminal. If there is something I can do in there, then please give idiot proof instructions. Thanks for looking.