Scroll down to the "Multiple displays" section. How to set up dual monitors Step 1: HDMI — Six-sided, flat port. It's a screen-shaped icon in the System Preferences window. It may be because your monitors are the "wrong" way around i. Show only on 1 — Blacks out the second monitor and shows content only on the first monitor. Found on older Macs.
DisplayPort — Resembles a rectangular port with a crimped side.
How to Connect Two Monitors to Laptop [2019 Tips]
You can also control many of these settings by right-clicking the desktop and selecting your graphics control panel. DVI — A wide piece of plastic with numerous small square holes in it. Cheaper monitors usually have less connections, which is fine, but just make sure the connections on the monitor match the outputs on your graphics card. Microsoft Windows 8: Check your computer's video output ports. Plug one end of the second monitor's video cable into the back of the computer, then plug the other end into the second monitor.