No matter what the scene is, whether it's a plane, or a complicated mesh, whenever I render with Mental Ray, nothing renders. An AutoDesk Error Report shows up and nothing is rendered. Sometimes it even shuts down the program. This has all happened after I updated my Mac a few weeks ago. Running Maya 2012. Maya Software renders fine, it's all mental ray. What the hell is going on and how do I fix it? I have a project I'm behind on now because of this.