With just a few minutes of your time and the appropriate accessories, you can connect an extra display to your Mac and increase your productivity. I don't do this too often, but it can be a nice way to read documents. Initially had no problem, but eventually noticed a flickering issue with the monitor that I tried to fix by rebooting my computer. If I attach a macbook pro 2013 to same displayport The UP3214Q works perfectly fine . Battery Drain. Here's how to use a second screen with your Mac or MacBook, including finding the right adapter and cable. When trying to reboot the first time, I was not able to get any image on my external monitor. If I attach a Dell UP3214Q the monitor stays black. To turn on AirPlay, follow these steps: To turn on AirPlay, follow these steps: Make sure that your TV is turned on. You can also use it to write, sketch, and mark up documents while seeing the updates live on your Mac. Going into “full-screen” mode on my apps causes my second display to go black. With Apple TV, you can mirror the entire display of your Mac to your TV, or use your TV as a separate display. How to set up multiple monitors with your Mac. Plug your Mac back in and leave it for about 5 seconds. No monitor appears in any apple menu, there is nothing to ‘gather screens’ etc. This took me by surprise as my builtin Nvidia GeForce 9400M 256 MB should support resolutions only up to 2560×1600. Want to be more productive on your Mac? Running out of battery is one of the most common reasons why your Mac screen goes blank. Still with your Mac’s black screen on startup, enter the password — as if you would do normally. How to set up multiple monitors with your Mac. When I connected it back again, it just did not work. Right-click on your desktop, and click on Screen resolution. Add another monitor, and you’ll spend less time switching between spaces, tabs, and windows. I just got a iMac 20" 2.1GHz (2006) ... Connect a second monitor if it stays on when the onboard screen goes out, it’s not the video card. Enter your password — a surprising trick that works. How to Fix Mac in Black Screen; Why Does My Mac Go Black? Great!, I thought. With just a few minutes of your time and the appropriate accessories, you can connect an extra display to your Mac and increase your productivity. The solution is simple. After disabling dashboard my processor clock dropped 20% = cooling down my mac. Just click on it. I’ve had this problem when setting up dual monitors before. When that dialog is displayed, click the Seeing tab (if it's not already selected) In the Display area, click the Use Grayscale checkbox; This should make your entire Mac display (monitor) black and white. It's possible to connect a second (or third) display to your Mac. Even worse, the Mac screen goes black randomly and ruins the files that you was working on. El Capitan fixed this for a while, but then I’m back to where I am. If your MacBook Pro/Air, iMac is stuck in black screen and doesn't respond, check out these solutions. The Solution. Though it looks counter-intuitive you may try this solution when your Mac screen goes black. In the rectangular box that shows your monitor setup, on the right-hand side is a button labeled Detect. Random Black screen, Help please. Mac's display flashes each time monitor is connected, but monitor says no signal detected.