17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (2023)

If you have problems withexternal monitorsdoes not work on your Mac after upgrading tomacOS is coming,macOS Monterreyor after purchasing an Apple Silicon M1/M2 Mac, here's how to get it working again.

Many users have found that after upgrading to Ventura, Monterey, and even Big Sur, one or more of the external monitors they were using suddenly stopped working.MacBook Pro,mac studioor Mac Mini.

The problem affects all brands of monitors including LG, Dell, BenQ, Asus, Acer, Xiaomi and even those from Apple.studio ad.

At worst, some Mac users have found that theExternal display not recognized by Ventura or Montereywhen connected via USB-C or Thunderbolt.

In other cases someThe monitors are completely blacked out.omacbook pro not chargingconnected via a Thunderbolt or USB-C cable.

try otherstemporary power outages that come and go, unstable connections, blurry fonts, discolored fonts, distorted images or screen flickering.

For anyone who just bought the Mac M1 or M2 and is trying to use more than one external display, it's important to know that theThe base model M1 and M2 chips don't support more than one external monitor, so they don't recognize dual monitors.

If you're having trouble connecting more than one external display to an entry-level Mac M1 or M2 model (i.e., not a Mac with an M1 Pro, M1 Max, or M1 Ultra chip), we recommend you check them out.Solutions to make dual monitors work with Mac M1 and M2.

However, for users who only use one monitor and find that it has suddenly stopped working after upgrading to macOS Ventura, Monterey or even Big Sur, these fixes will come in handy.

The display issues have affected Intel Macs and newer M1/M2 Macs with Ventura and Monterey, so it's not just an Apple Silicon Mac related issue.

External monitor issues have been a constant concern since the release of Big Sur, although updates 12.1, 12.2, 12.3 and 12.4 for Monterey fixed this issue for some users, many Ventura users are still having issues with no updates from Apple to the view.

Note that if macOS Ventura and Monterey recognize your external monitor, it's youYou have problems with the resolution of your external monitorsuch as text that looks blurry or too small, especially on 4K or 5K monitors, you may encounterthese external screen resolution solutionsmost useful.

You might like:

  • The Best Monitors for 2022 MacBook Pro
  • The Best Mac Studio Monitors of 2022
  • The Best Mac Mini Monitors of 2022
  • How to Connect a Monitor to a MacBook Pro
  • How to Connect a Monitor to a Mac Studio

Learn how to troubleshoot external displays on Intel and M1/M2 Macs, including those running Ventura, Monterey and Big Sur.

quick navigation

  • 1. Instale o DisplayLink Manager
  • 2. Reset the external monitor
  • 3. Change refresh rate
  • 4. Turn off true tone
  • 5. Change DisplayPort settings
  • 6. Use the HDMI connection
  • 8. Allow USB-C connections
  • 9. Testar SwitchResX
  • 10. Change Thunderbolt, USB-C or HDMI cable
  • 11. Disable night shift
  • 12. Use a better screen
  • 13. Boot into Safe Mode
  • 14. Update macOS
  • 15. Disable graphics switching
  • 16. Kill the WindowServer process
  • 17. Reversion from macOS to Monterey

1. Instale o DisplayLink Manager

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (1)

If you areUse a Thunderbolt or USB-C hub/dock to connect your displays to an Intel or M1/M2 Mac, then you can find that you downloaded and installed theDisplayLink AdminSynaptics help.

DisplayLink Manager allows you to connect and manage two displays on Mac through one hub, even on Mac M1/M2.

Even if you're only using an external monitor, DisplayLink Manager can fix the problem if your Mac doesn't recognize it.

It's important that the docking station or hub you're using supports DisplayLink, and you can find out by looking at the model online, but most Thunderbolt hubs support DisplayLink.

(Video) How To Fix External Monitor Not Working on Mac OS Ventura

After installing DisplayLink, your display should show up in your Mac's display settings, where you can manage resolution, brightness, and more.

2. Reset the external monitor

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (2)

Sometimes when you change resolution or refresh rate settings, your external monitor may not support the selected setting and turns black.

In some cases, the monitor will reset to a supported resolution or refresh rate, but sometimes this is necessaryReset external monitormanually to get it working again.

Note that resetting the NVRAM will generally not fix this issue as it is specific to your Mac's display settings.

Here are full instructions on how to do this.Reset an external monitor here.

If all else fails, it's definitely worth contacting the external monitor's manufacturer to see if there's a firmware update or known fix for the Ventura, Monterey, and external monitor issue.

Most manufacturers are already aware of the problem and many will introduce fixes or propose specific solutions for their models.

3. Change refresh rate

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (3)

For some reason, the refresh rates of some external Ventura and Monterey monitors were affected.

It seems that in some cases Ventura and Monterey are trying to push external monitors at a refresh rate they are not capable of.

Most external monitors run around 60Hz, although some gaming monitors can run above 100Hz.

To change the refresh rate, you need to access your Mac's display settings by going toSystem Settings > Displaywhere you can manually change the refresh rate.

We recommend setting it to 60Hz if possible, but you might want to try experimenting with all available options to see if that helps.

If you can't see the refresh rate in the settings, try changing the resolution setting from "Standard for display" to "Rescaled".

You will be able to see the refresh rate and change it manually.

4. Turn off true tone

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (4)

Some users have found that disabling True Tone on their MacBook Pro's screen has helped to get external displays working with their Mac again.

This is mainly inMonitores LG 4K- o 5K-UltraFinethey support your Mac's True Tone extension for them.

On MacBook Pros and iMacs that support True Tone, go to the display settings and simply uncheck the True Tone checkbox to disable it.

(Video) Fix Second Display not working in macOS Ventura

5. Change DisplayPort settings

On LG monitors if you get into itSettings > GeneralYou can select the DisplayPort version your Mac uses to get it working again.

The DisplayPort version is usually set to 1.4, but if you change it to 1.2, your monitor will be able to work with your Mac again.

Some Mac Mini users have found that changing DisplayPort settings has helped macOS Ventura not recognize external displays.

You can also try downloading and installing thelatest version of DisplayPort Managerif you don't have a configuration option.

6. Use the HDMI connection

If you're having no luck with your monitor's USB-C or Thunderbolt port, try using the HDMI port.

If the Ventura/Monterey problem is related to the USB-C or Thunderbolt ports, no solution other than switching to HDMI will solve it.

Note that this may not work on a Thunderbolt hub. You must connect the HDMI port directly to your Thunderbolt port using aHDMI to Thunderbolt Adapter.

Note that HDMI is not as good as Thunderbolt as Macs only support the old HDMI 2.0 standard.

This means that while you can get 4K resolution through a Mac's HDMI port, you can't get high 120Hz refresh rates through HDMI.

HDMI 2.0 only supports a maximum screen resolution of 3840 x 2160 with a refresh rate of 60 Hz.

HDMI 2.1 supports the same resolution of 3840x2160 but with a refresh rate of up to 120Hz and can also support resolutions of 7680x4320 at 60Hz.

7. Disconnect and reconnect your hub

If you're using a USB-C hub, Thunderbolt or HDMI adapter to connect your displays to your Mac, unplug and unplug the device and plug it back in.

The most reliable hub to use with an external display connected to your Mac is theApple USB-C AV digital multiportaAdapter.

If you are not using a DisplayLink compatible hub, you should also try checking the manufacturer's website to see if any updated drivers have been released for your hub to work with Ventura and Monterey.

8. Allow USB-C connections

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (5)

macOS Ventura introduced a new USB Restricted Mode feature for Mac M1 and M2 that requires you to allow USB-C devices such as monitors to connect to your Mac.

If enabled, it may prevent your display from connecting to your Mac. If you upgraded to Ventura while the monitor was plugged in this shouldn't be an issue, but if you plugged it in after the upgrade, macOS may have blocked it.

Try disconnecting and reconnecting your monitor to the Thunderbolt/USB-C port and click "Allow" when prompted.

Next, it may be necessary to set the monitor to a mirrored display and then switch to extended display to complete the setup.

If macOS Ventura still doesn't recognize the external display, you can disable USB Restricted Mode by going to:

(Video) macOS Ventura: Custom Scaled Screen Resolution 2022-2023

  • Orapple logoupper left corner of your screen.
  • click inSystem Preferences > Privacy & Security
  • Scroll down toSecurityE no"Allow accessories to connect"Select dropdown list"Always".

9. Testar SwitchResX

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (6)

ChangeResXis a simple app that lets you instantly change the screen resolution of your Mac or any external monitor connected to it.

is used forFix external screens with bad resolutionswhen connected to Mac M1 and M2 with Ventura and Monterey.

If your Mac recognizes your display but the resolution is low, you can get your external displays working again by experimenting with the resolution settings.

SwitchResX has been updated to work with the M1 and M2 chip as well and allows you to change the resolution of your external monitors, adjust screen rotation, adjust screen underscan and much more.

10. Change Thunderbolt, USB-C or HDMI cable

In some cases, simply changing the Thunderbolt or HDMI cable will resolve the issue.

If you are using a cheap Thunderbolt or HDMI cable, we recommend buying an official one.Apple Thunderbolt-Kabelor a high end HDMI cable like this oneCabo HDMI JSAUX.

11. Disable night shift

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (7)

Nightshift adjusts on-screen colors to the warmer end of the color spectrum. However, disabling it fixed the Ventura and Monterey monitor issues that some users were experiencing.

To disable Nightshift, go toSystem Settings > Displayand then turn off Nightshift.

12. Use a better screen

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (8)

best ad(formerly BetterDummy) is a switchblade that aims to do just that.Problem solvingwith external monitors connected to your Mac.

BetterDisplay has been very effective at fixing external displays that look blurry or low quality when connected to the Mac M1 and M2.

BetterDisplay works by creating a virtual display on macOS and then mirroring that virtual display to improve image quality when connecting your Mac M1 and M2 to external displays.

This is primarily to improve results with cheap QHD or FHD monitors, but it's worth a try if you can't get your Mac M1 or M2 monitor to work with an external monitor in Ventura and Monterey.

You can find more information about BetterDisplay and instructions here.Troubleshoot external monitor resolution here.

13. Boot into Safe Mode

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (9)

If your Mac doesn't recognize your screen, starting in Safe Mode gives you a way to diagnose the problem.

Booting into Safe Mode uses only the most important parts of macOS to identify apps or devices that might be causing problems with your Mac.

If your external display is detected on your Mac in safe mode, you can restart normally and your external displays will start working again.

(Video) Apple MacBook Air to External Displays Setup | MacOS Ventura 2023

However, sometimes this doesn't work and you need to figure out what app or process on your Mac is preventing your external displays from working properly.

In that case, you should restart your Mac in normal mode and start removing oruninstall appsYou do not use or operate an antivirus or malware scanner such asMalwarebytesremove malicious processes or applications.

To start in Safe Mode on an Intel Mac:

  • Power off or shut down your Intel Mac
  • Turn it on by pressing the power button in the upper left corner of the keyboard and immediately holding the Shift key until you see the login window
  • Log in to your Mac that is in Safe Mode

To boot into Safe Mode on an Apple Silicon Mac:

  • Power off or shut down your Mac M1/M2.
  • Press and hold the power button until "Loading boot options" appears.
  • Choose the startup disk from which you normally start your Mac.
  • Hold down the Shift key and click "Continue in Safe Mode".
  • Log into your Mac which is now in Safe Mode

14. Update macOS

Apple may have already released an update to fix unrecognized external displays in Ventura/Monterey and other issues.

That was the case with macOS Big Sur, and the Monterey updates fixed some, if not all, of the external display issues that Mac users are having.

Make sure you've updated to the latest version of macOS by going toapple logoin the upper left corner of the screen and selectSystem Settings > Software Update.

15. Disable graphics switching

Sometimes automatic graphics switching doesn't work well with external monitors connected to a Mac, so it's worth turning it off.

Automatic Graphics Switching is designed to save battery power when your Mac is offline using less power for graphics.

To disable graphics switching in Ventura, go toapple logoin the upper left corner of the screen and selectSystem Settings > Battery > Options.

To disable graphics switching in Ventura, go toapple logoin the upper left corner of the screen and selectSystem Settings > Battery > Options.

To disable graphics toggle in Big Sur Catalina and earlier, go toapple logoin the upper left corner of the screen and selectSystem Settings > Battery > Options.

16. Kill the WindowServer process

17 Ways to Fix External Monitors Not Working on Mac (Including M1/M2, Ventura and Monterey Mac) (10)

Some users who have had issues with macOS Monterey not detecting external monitors have found that stopping the WindowServer process running in the background on macOS resolved the issue.

To do this, follow these instructions:

  • Make sure your display is connected to your Mac and search for Spotlight underactivity tracker.
  • Activity Monitor looks for "WindowsServer"
  • Double click on it andarrest prisonthe process. If necessary, you can also force the operation.

The process will automatically restart and your display should be working with Ventura again.

You'll need to repeat this process every time you start your Mac running macOS Ventura with an external display.

17. Reversion from macOS to Monterey

If the problem is that the Ventura doesn't work or doesn't recognize the external display, then you have a problem.Time Machine BackupYou can easily go back to macOS Monterey before the upgrade.

Here are full instructions on how to do this.Restore a Mac using Time Machine here.

If you didn't back up with Time Machine before upgrading to Ventura, upgrading to an earlier version of macOS will take much longer.

(Video) Apple Mac OS Ventura update - screen stop working FIX

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