Since the last update (21A5534d), my MacBook doesn't detect my 2nd display. I've tried swapping the display with a new one and trying different connection methods. My MacBook's built-in display goes black for a moment when I attach the cable, but nothing else happens.
I seem to remember that the System Preferences > Displays used to have an option for manually detecting a display, but it doesn't appear to be there any more.
I hope I'm not the only person experiencing this.
Same here. Only it is intermittent. 1 time out of 10 it actually connects. The screen sees something as it auto-selects the correct HDMI port, then it all goes black.
I have the same exact issue MPB 2019 16". I have a ivankey USB C dock with dual HDMI. That goes into a KVM and then into 2 identical Samsung curved monitors. When I switch on the KVM and come back to the MPB, it usually drops the right monitor...it won't detect it. I have to unplug/plugin the dock about 10 times and then it will work until I switch the KVM. I never had an issue before Monterey. It also doesn't remember the settings for the monitors. The desktop backgrounds go back to default.
Really frustrating @apple -- external monitors do not connect consistently or at all at times.
adding to the thread. just updated mine today. My 2nd display works when my macbook is plugged in and even my laptop is closed. But if I were to unplug my laptop the display shuts off and doesn't work. Even though the only thing done was just unplugging the battery. Before the update I was able to do this without a problem. C'mon @apple
Well, personally "I hope you are the only person experiencing this" :-) But clearly no.
The displays control panel... It's wrecked. Not only is the detect-displays button just completely gone ("who needs this?" -Apple Intern) but go ahead once you manage to get the displays working and try to arrange them. Variously the Arrange panel, which I think has been flawless since Mac OS 6 ... Doesn't register your mouse clicks and if it does it may half-draw the screens. I quit and relaunched system preferences several times to no avail to try to make this basic part of the system work again. For years Apple was way ahead of microsoft on display management... and now we're back to the stone age.
Thanks for the suggestion on unplugging the monitor. No dice. Randomly I can get it working. It's likely timing related, but the code at this point is completely unstable.
Same here. Its total garbage. Never thought I would say that my windows PC's are now more reliable. Sad part is I have another MBP M1 fully loaded on order. Most expensive computer I think I have ever purchased. I think I might jump off a roof if I have similar issues...lol
I've got the same with a 2020 MBP M1 and Samsung external monitor. I've fixed it by unplugging all cables from Mac and rebooting screen and Mac. By which i mean... not just turn off the screen with the button on the screen, but really pull the plug out of the wall. then reboot mac, then plug in screen power, let screen come on and plug into Mac. Some posters on other sites are saying that you have to use mac power supply for the mac... but I always have that and my external screen is also plugged into mains power. Good luck...
MBP 2015. Detection of external monitor on DisplayPort still broken with latest 12.1 beta 4 (21C5045a). HDMI works.
Problem still persists, the monitor appears in the screen settings after 8 seconds, says it was disconnected. I believe that Apple developers should only use iMac to not solve this problem of hubs for external monitors, if they used that and were with the same problem it would come out in the first fix. Problem still persists in 12.1 beta 4 (21C5045a)
I have the same issue using a macbookpro (2020), use 2 displays since the update to monterey no longer detects one of displays. I have another machine also macbookpro (OS bigSur) and detects the 2 displays when I plug it to the same set up: startech hub usb c. This is extremely annoying :/
Same issue with me, Very disappointed with Monterey, I'm finding a way to downgrade to Catalina.
I had the same issue and managed to fix it by replacing the cables and the Thunderbod2 - USB-C adapters, which aren't compatible with MiniDP.
Once I connected both monitors with a DisplayPort -> USB-C cable, the issue was gone, and I was also able to see the 'Display Settings' and 'Detect display' buttons under System Preferences > Displays.
I hope that helps
What worked for me was disabling the Automatic graphics switching, in the Battery settings, while the external display was connected. I use usb c to usb c connection. After doing that my external display was immediately detected, and I could enable again the Automatic switching, if I wanted to. Hope this helps others.
THANK YOU 1000X! It worked; you just need to restart after changing the battery settings.
It doesn't work anymore on version 12.1, that option has been removed but the hub works for hdmi
Same issue on mi iMac 21 2017. I´ve upgraded to Monterey. Worked well for a few weeks but suddenly no longer detects the HP 27er monitor. Any ideas or fixes? Thanks.
Same here. I will downgrade to Mojave...
WORKING SOLUTION: THANKS to Teleccon here, the disabling the Automatic graphics switching in the Battery settings, while the external display was connected helped me. I was going crazy with this situation. You just need to restart it after the change with your monitor connected. It seems that after that you can change the battery setting back if needed.
That indeed worked.
Started happening after the 12.1 upgrade. After multiple reboots... nothing. Unplugged monitor and plugged back in. Success!
There is some caching in the Thunderbolt.
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pandeyg2106
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Crazytune
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shoedog_1970
Add a CommentI have the exact same issue. I am a photographer and my livelihood depends on my editing which I do on the external monitor. Now suddenly after the update I can no longer use my external monitor. This makes me switch to windows right away. This is purely a case of cheating.
I have the same exact issue too. The button for manually detecting an external display in the display settings window doesn’t appear when I hold down the option key. I tried connecting the same HDMI cable and monitor to another MacBook Pro with Monterey and the second display worked. I also tried putting my iMac to sleep and waking it up. I also disconnected and reconnected the HDMI cable while my iMac was powered up. I also reset the NVRAM and PRAM on my iMac, but still no good. I tried entering safe mode on my iMac, still no good. None of the methods suggested on YouTube or online seem to work. Finally, I downgraded to OS X Mavericks and the second monitor did work on my iMac. This proves that it’s not a hardware issue with my iMac and must be a driver issue. Monterey is trash!
Same issues here. After a couple of weeks with Monterey, my 2nd monitor will not work. Everything else on the hub works. Every other port has been tried and the monitor connected directly. Nothing works. And, holding down OPTION to toggle the "detect external monitors" button is also not available since Monterey.