A:AnswerUnless you add a video card, you cannot do it. You cannot daisy chain HDMI as you can with a display port.
Sorry, you are asking for an answer which does not exist.
A:AnswerYes if you look at the monitor where the power button is there are 4 buttons to the left of it. Push the one all the way to the left two times and a pop up screen will come up . change the mode to standard it sounds like your running it in comfort mode.
A:AnswerIt is very sharp and adjustable. We like it a lot and use it as a second monitor for our laptop. Especially useful when looking at spreadsheets with lots of cells or when viewing photos to cull out those with issues.
A:AnswerI have a similar older Dell monitor that works with a Mac Book Air. But I have to use a VGA to Mini Display Port adapter to connect the Mac to the external monitor.