Normally your Mac will detect the external display when it connected to Mac. But many Mac users have a complaint that my Mac not recognizing external displays after updating to Mac OS High Sierra. Here I am going to tell you the solutions to fix this issue.
Before trying these solutions,
Having upgraded to macOS High Sierra, many users have reported facing certain issues with connecting the external monitors to their Mac. In particular, many could get only one extended screen be synced with Mac, while the other stayed fully or partially irresponsive. A Mac fix prompt would appear on the screen suggesting them to reset SMC. Displaylink software – end user license agreement. Important - read before downloading, installing or using. By downloading, installing or using this software and any associated materials (collectively, “the software”), you agree to be bound by the terms of this end user licence agreement (“eula”). Mar 26, 2020 Mac OS 10.15.x Specific Issue Troubleshooting. Mac OS Catalina 10.15.x requires 'Screen Recording Permission' for DisplayLink devices to work properly. The screen is not actually being recorded by DisplayLink. DisplayLink display connectivity has been limited on macOS releases 10.13.4, 10.13.5 and 10.13.6. This is solved from macOS 10.14 Mojave onwards and v5.x DisplayLink software. DisplayLink recommends updating 10.14 to restore multiple extended display support.
Solution 1: Detect your Display
Solution 2: Sleep and wake your display
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Solution 3: Enable Show mirroring options in the menu bar
Solution 4: Update DisplayLink driver
One of the Mac user said that updating DisplayLink Driver solved this issue. So update DisplayLink Driver on your Mac (or) uninstall and then reinstall DisplayLink Driver.
Click here to download the latest version of DisplayLink Driver.
Solution 5: SMC Reset If your Mac has a non-removable battery,
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If your Mac has a removable battery,
Solution 6: Reset NVRAM/PRAM
SEE ALSO: External Display Not Working on Mac
Solution 7: Restart your Mac in Safe Mode (Safe Boot) Restart your Mac in safe Mode will fix many issues on your Mac. But you can’t use some features in Safe Mode.
Other Solutions:
Displaylink For Mac Os High Sierra
If you know any other solutions to fix this issue, let us know through your comments.
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December 2020
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