Unfortunately the answer is going to be the same. Your Macbook may have an HDMI port, but it's an HDMI OutputOutput, not an Input. YouThe monitor is connected internally, so you don't have any direct access to the monitor itselfmonitor's inputs.
This is the way laptops (and iMacs) are designed. The monitor is connected internally, so you as the user don't have access to its inputs. The HDMI port you mentioned is for multi-monitor setups or for outputting to a projector - it is an HDMI Out. That is, theThe computer can send a signal out through that port to another monitor. It, but it can't take an incoming signal and transfer it to the laptop monitor.