Are you struggling with External Monitor not working on Mac? Don’t panic you are not alone suffering with this issue as several users have claimed that that their External Monitor is not responding on their Mac, Macbook air and Macbook Pro. So keep reading the blog till the end to get past the problem.
Note: You can follow the below mention guidelines to resolve several issues related with the external monitor like External display appears blank or black, External Monitor flickers on & off, Lines or Static covers the screen, images appeared distorted or scrambled, everything appears too large or too small.
Try these Methods to fix External Monitor not working on Mac?
Method 1: Check the Compatibility of your external monitor
You should know that not every external monitor is suitable with every Mac. It really does not matter if you are using an adapter to connect both devices together; they still need to run compatible software for every feature to work.
Go to the manufacturer’s website for your external monitor to check its compatibility requirements. After that go to Apple>About This Mac to ensure your Machine meets them. Tap on the System Report button for more information about the ports on your Mac.
Well you might know that Thunderbolt 3 ports and USB-C ports are not the same but they look alike from the outside. And if your monitor needs Thunderbolt connection then you need to connect it to Thunderbolt port. And the same goes for Thunderbolt 1 or 2 and MiniDisplay ports on older Macs.
Method 2: Update all the Software on your Mac
We always suggest our users to use the updated version of the software. And to do the same follow the below mention guidelines:
Step 1: First of all open Apple Menu & go to System Preferences>Software Updates to update MacOS.
Step 2: After that open the App Store and tap Updates in the sidebar in order to install app and firmware updates.
Step 3: Lastly go to the manufacturer’s website for your external monitor or display cable to check if there is other firmware updates to install. You should also look for updates to any hubs, extenders or adapters you are using.
Method 3: Restart your Mac with External Monitor connected
If you are still struggling with External Monitor not working on Mac then we suggest you to restart your Mac But don’t unplug your display before you do this, just open Apple Menu & select Restart.
If your external monitor is still not working then try putting it to sleep instead. Open the Apple Menu and tap Sleep. Then wait for 30 seconds then move the mouse or press a key to wake your Mac. And if you have a MacBook then close and reopen it to put it to sleep and wake it up.
We also suggest you to restart your external Monitor. So try to disconnect and reconnect it to your Mac between turning it off and turning it on.
Method 4: Adjust the System Preferences for Mac’s display
In this method we suggest you to adjust the settings in the System Preferences on your Mac. And to do so you can follow the below mention guidelines:
Step 1: Open the Apple menu & navigate to System Preferences>Displays to view your options. Tap the Gather Windows button to view the System Preferences for all your displays on your Mac Screen.
Now adjust the brightness & color options for your external Monitor. After that test the various resolution options and then Press Escape to undo any resolution changes if they make matters worse. If you want you can also use Overscan or Underscan slider to adjust picture size so that it fills that entire screen on your external display. You need to check the external monitor’s instructions to adjust any built-in options.
Method 5: Reconnect all the cables & use a different port
First of all disconnect the cables connecting your Mac to your eternal Monitor. But before connecting you need to inspect the ports and cables for the signs of damage. And if required clean your port if it’s dirty.
If you are still facing External Monitor not working on Mac after reconnecting it then you need to try another port on your Mac. Or you can connect to a different input or the display, provided there is more than one input present.
You need to highly avoid using extension leads, adapters, and hubs. Try to connect your external Monitor to your Mac directly instead. And finally ensure that your Mac and external display is connected to power.
Method 6: Detect Displays connected to your Mac
If none of the above mentioned methods works for you then you can try this one. When your Mac fails to detect a new display in such case you can’t use an external monitor on your Mac. So you can follow the below mention guidelines to resolve the issue.
Firstly return to the Displays Page in your System Preferences. Then press & hold the Option button on your Mac to make a Detect Displays button appear. After that, tap this to make your Mac detect new displays connected to it.
If it does not works for you then try booting Mac in Safe Mode .And to do so hold Shift while Mac starts up. Booting in safe mode stops the third party software and helper applications from loading on startup. And it also runs a variety of maintenance tasks. Finally Restart your Mac again to exit the safe mode and check if the issue resolved or not.
That’s all about External Monitor not working on Mac, Macbook Pro, Macbook Air. If you liked the blog then keep visiting the site for more useful articles.