I think you're right. I missed the processor spec. Thanks for your help--sorry about the rookie mistake.

Hi. I'm new to the forum, but will try to supply the info needed. I have a MacBook Pro 8,1 (13-inch, Early 2011) running High Sierra (10.13.2). Processor is 2.3 GHz Intel Core i5, 16 GB memory, Intel HD Graphics 3000 512 MB. I've installed the latest version of Media Composer | First (2018.1). When I try to start it up, it gets as far as the