A:AnswerYes, you can use the Microsoft HDMI as long as it supports a HDMI 1.4 version and we always suggest that you use the cable that is shipped with the monitor.
A:AnswerI use my monitor with my Dell laptop. The monitor plugs into a wall socket, and another cable plugs the monitor into my laptop. I cannot say if my model of monitor would work with your Macbook. I would think a sales person at Best Buy could advise you on that.
A:AnswerSorry but I'm not that technologically that savvy to answer this question. I would critic the fact that the monitor doesn't have an internal speaker system so you have to plug in a headset of speakers.
A:AnswerPlease check if the port that you are using to connect to your new system is compatible with the monitor. Alternatively if required, please contact Dell technical support for help.