Dec 30, 2020 · Turn off macbook screen when using external monitor. Portable Macintosh computers have a so-called “clamshell” mode – this allows you to close the lid of your portable Mac while running your desktop and programs on the external display.
Mini DisplayPort Cables to Connect to Apple Devices. The most common use for mini DisplayPort cables is connecting Apple® computers like a Mac mini® or MacBook® to an external display. DisplayPort has replaced the DVI port that was on Mac computers to provide better connections to external devices for video streaming.