The thunderbolt port of a Macbook is not designed to be a video input. Typically what people do is to hook up their camera via USB and read the flash as an external drive, or maybe even easier, once recorded, move flash to a flash reader attached to Macbook. If u want to do this while recording in real time, I have not the faintest idea whether it's do-able. U should consult manual and search for "monitor."