Generally it is the monitor on the HDMI input, though on some does it on both HDMI and DP. On top of that, you have two dedicated USB-C ports as well as two front access USB 3. You might want to plug into an external display and move your MacBook out of the way to free up. If you have no desire to get a separate Mac desktop computer, but want to either supersize your laptop's screen for gaming or need to get additional screen real estate while you work, then connecting your MacBook, MacBook Air, or MacBook Pro to an external display is the right call. I have a Late 2012 Macbook Pro Retina that just started having a display problem.

Will this work with my Apple Thunderbolt 2 display/device? no, as it have DisplayPort only. When connected using HDMI, the screen on MacBook is stable, but the bottom part on external monitor flickers/shakes. First, connect the keyboard and mouse to your MacBook.

These possible problems and solutions are applicable for all the MacBook Pro models of MacBook Pro 13″, MacBook Pro 15. To ensure proper Self-Test operation, remove all digital and analog cables from the back of monitor. Macbook pro external monitor flashes on and off g.