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 problem... First real problem since 10y I have had with a mac. Please correct this!
I have the same issue. MacBook Pro 15 2018 - running Monterey 12.6. Please send a fix ASAP!
this have also worked for me
I am having the same issue. I have a 16" 2019 MacBook Pro with a AMD Radeon Pro 5500M 8 GB. Clearly, the card is enough to drive two monitors, a 27" LG UltraFine Display and a 27" Apple Thunderbolt Display (with Thunderbolt 2 to 3 Apple adapter). I also use a Logitech G305 mouse, which utilizes one of the Thunderbolt ports. If all three are plugged in and I close the clamshell, only one monitor displays. I then have to open the clamshell, unplug all thunderbolts. Then close the clamshell, plug one device in at a time - sometimes it requires me to restart for things to work. This has been common since I upgraded to Monterey a month ago. Prior to this, all just worked.
Guys, it is cable issue. I tried two original Mac 2m charging cables, second monitor was not detected although charging, keyboard, mouse worked. I tried two different cables (Not Mac original cgharging cables). Cables from my HP laptop, and secondary display was detected with both cables.
I have a similar issue. Got an i-tec docking station with two external monitors connected via DP. Using Thunderbolt 4 cable. Works with Lenovo, works with Dell, but obviously not with Apple. It's doing an external display but shows both of the displays as one thus showing the same exact thing on both of them. Please fix this!
Still no resolution for this? Come on @APPLE - get it together...this direct result of Monterey upgrade
I've been able to get monitor recognized when in safe mode but not otherwise.
I Have a Mac Pro M1 and was forced to upgrade to Monterrey 12.6.1 and after the upgrade my external monitors could not be detected. I am a software Engineer and this is affecting my work.
Hi there,
You might have better luck asking this question over in Apple Support Communities run by Apple Support.
Same case, M1 Pro, last update has made me reboot every morning to be able to connect to a docking station . This is getting ridiculous .
Solved for me... I tried several of the methods below. I'm running two LG 5k displays from my iMac and for months only one would work. I tried upgraded to thunderbolt 4 chords and they came on after restart. I read in another forum that this worked for them and it worked for me. Some sort of software update I guess.
the cables I ordered ... hope this helps
https://www.amazon.com/dp/B09KTB326W?psc=1&ref=ppx_yo2ov_dt_b_product_details
It has been more than a year since the first post. This issue has been inherited from Monterey to Ventura, yet absolutely no reaction from @apple. I am so flabbergasted by the snobbishness of the apple in general. I'm sure they know how much we've invested.
Setup: two Dell P2412H monitors and Dell D6000 docking station.
I've experienced this issue intermittently, on MacOS Monterrey and Ventura, but also when using the same gear on a Windows laptop.
I tried disconnecting and reconnecting power cables and USB-C connectors in different orders with no luck.
What worked to my surprise was starting the Display Link Manager application (https://www.synaptics.com/products/displaylink-graphics/downloads/macos). That's it. Only starting this app brought my 2nd monitor back to life.
I'm also having this problem. My setup is Mac Studio 2022, OSX 12.6.2, 2x LG 4k displays connected via USB-C. Tried different cables, monitor settings, display settings and no luck. Do a reboot or a shut down, power on, my second screen doesn't power up, stays asleep. When the computer powers back up, to get second screen back, I unplug it from power, and plug back in and it works again. VERY frustrating, as doing a reboot remotely means I can't get my second monitor up and running. Will try the above software.