Many users report that macOS Sonoma does not recognize external monitors after updating. There have been issues with various third-party external display brands, including LG, Dell, Samsung, BenQ, etc. So, if you are facing this issue, then you are in the right heaven as we have some fixes to this issue. Therefore, if you want to resolve this, make sure to read and apply all the fixes one after the other. So, let’s get started with the guide.
What to Do if Mac Doesn’t Recognise External Monitor
It may be necessary to check if your Mac isn’t recognizing your external monitor by checking whether cables or adaptors are damaged or if cables are loosely connected, checking the external monitor display settings and unplugging and replugging cables until your Mac is able to recognize the monitor.
Fix 1: Restart Your Mac Device
Using a simple hack, you can restart your computer to fix the macOS Sonoma update problem. Hopefully, it will solve the problem in a few seconds. In the drop-down menu of the Apple icon, click Restart. When the screen freezes, you can force the system to restart.
You can force the system to restart by pressing and holding the power button until it turns off. Once it has been powered on for a few seconds, press and hold the power button again. If the App Store needs to identify which processes need to be updated, restarting the system can be helpful.