I am fairly new to FCP, but not new to non-linear editing, having spent a great deal of time with the Media100 before its demise a few years ago. I have never had any formal training in computers, coming from the linear editing world of television production straight into the Media100 where I was forced out of necessity to learn how to edit before I knew anything about the machine.
I described the system that I am working on in my first post. Taking into account that I am not an expert on the inner workings of computers, take this with a grain of salt, I feel that there is a software conflict somewhere. The problems began after updating the OS, Quicktime, FCP and Blackmagic software.