In this case, the blue rectangle with the tiny white bar is the main screen (your computer) and the second display (project0r) is additional screen real estate “on the right”. Instead, click on the “ Arrangement” tab on the top:Īs you can see, it shows the “relative layout” of the two screens. Nothing to worry about, just leave it for now. Notice the options for setting the display have changed too. Your whole system should go black for a second or two as the operating system detects the other monitor, then it’ll show back up and the Displays window will have a new tab added: “ Arrangement“: But now, with that displayed, plug in the external project / monitor. Without an external display, monitor or projector plugged in, you’ll see this: Go to Apple menu -> System Preferences… to see this:Īs highlighted, click on Displays. Then, and only then, can you configure it to either “mirror” (which duplicates the same content on both screens) or “extend” your screen.īefore you plug it in, you’ll want to launch the Displays system preference. Then your macOS X system will automatically recognize the external display and automatically show an image on the new screen, whether it’s a gorgeous new 4K monitor or a big, old school VGA projector. I’m really getting to appreciate a straight HDMI adapter because of its wide compatibility and cheap cables. Smart move: check that the school has the necessary adapter in advance so there are no surprises. There are a number of different connection choices, of course, with PC-based “VGA” the most common, but as long as you have the right adapter, your Mac can handle just about anything, from DisplayPort to HDMI to, yes, VGA. Hooking up a projector to your MacBook Pro or MacBook Air is actually remarkably similar to plugging in a second monitor or display, both in the physical cables and in the software configuration tweaks you want to make for it to work properly.
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