My daughter updated her MacBook to the latest OS. I believe it is "El Capitan." She restarted her computer and was met with the message: "Your computer is disabled. Try again in 60 minutes. But seriously. Fuck you."
We both looked around and couldn't find this as a common occurrence. Indeed, no one else seemed to have this issue.. She has a Genius Bar appointment set up for later today. I'll follow up with more info as I learn it. Seems like someone at Apple has gone rogue.