Monterey 12.0.1. Second Monitor Issue

I have this same issue immediately after upgrading and have tried everything, including all the tips mentioned above. I am on multiple deadlines for graphic design projects and cannot utilize my second monitor. BOTH of my screens fade to black and my MacBookPro screen comes back on, but when the second monitor adapter is plugged into the USB C it flickers back off repeatedly. Designing on a single laptop screen is proving to be highly inconvenient. Needs a bug fix, stat.

Of course, this problem is alleviated when bypassing my hub and connecting my external monitor to my MacBook Pro directly via USB-C, but I'd rather only have one cable to plug into my laptop when sitting down at my desk—like I did before upgrading from Big Sur to Monterey.

Same here. After upgrading to Monterey, my second monitor is not detected. And, there is no "detect monitor" button via holding "option" key on the Display Preferences menu. Huge oversight on Apple's part.

My problem exactly. Just updated to Monterey 12.0.1 - good lord, this is why I always hate updating - it's always something. Apple - please let me use a second monitor again. Come on. And yeah, the unplug and plug back in - I bet every one of us did that, like I did, as a first line of trouble-shooting.

Preach! SO MANY MacBook users operate with at least one external monitor- and you’re right about the noise being made about this.

Hope they roll out a fix soon as it’s quite difficult to design on a single laptop screen.

I have two monitors connected using 2 Verbatim USB-C hubs connected and while it works most of the time, it often fails by hanging the machine or slowing it down significantly and displaying garbage on the screen or some UI widgets are red.

I also had an in-depth call with an Apple support representative who reached out to me from this forum. This included video of the issue being sent and trying a number of things to see if the issue would resolve.

he’s planning to follow up today, so it appears that this issue has surfaced and made its way up the list at Apple.

PLEASE! This is driving me nuts as well. The only way I can get the monitors to work is when I quit every application. Then, once I have been working on Final Cut for a while, or Photoshop, or Logic, they start to flicker again.

I too hope that a bug fix happens soon.

A significant amount of every day is spent trying to find a workaround.

I am having a similar issue on my 2019 16-inch MacBook Pro with 2.6 GHz 6-Core Intel Core i7. When I plug in two external displays to the usb-c ports the OS immediately freezes. Then I have to restart the MB multiple times to get everything to work. I did not have this issue with the previous OS versions.

I have a similar but slightly different issue.

I recently got an imac 2021.

I am connecting an LG ultrawide via HDMI -> thunderbolt cable.

When I turn on my computer, or when it wakes from sleeping it completely stops recognising the LG monitor.

If I go to the system preferences and displays section there is no way to "Detect displays" (holding control does not turn night shift into a different button, nor does going into scaled do the trick).

The only way I can get the monitor to work is by unplugging the cable and plugging it back in twice (from either the monitor or from the thunderbolt, doesn't matter which).

I don't believe it's the cable because before getting this cable I was using an HDMI cable attached to an adapter and was having the same issues (part of the reason I got the HDMI to USB C Cable). I know the adapter is working because I have an External HD hooked up to it, and it constantly recognises that. (Same reason I know the Thunderbolt port is working).

I can hook the monitor up to my old macbook pro (2013) and it works so I don't believe the monitor is the problem here either.

I can still use it, but it means that every time I turn my computer on, or everytime I come back to my computer after locking the screen I also have to go through plug/unplug dance and that's just frustrating.

Just received my new MBP M1max 14 with Monterey 12.0, upgraded to 12.0.1 and tried to use my 32" 4K external monitor via a Belkin TB dock, which I used with an MBP 2018 with Big Sur without any issues to this day. Now with the M1 14 it became a game of chance if the display works properly or not. Sometimes the 32 display shuts down accidentally, seems to fall asleep. Only restarting the Mac helps then. That is not the way I was used to work with my former MBP and this definitely spoils the fun I had with the new machine! Any fix in sight? Besides: the external monitor displays everything a little bit less sharp than before, the overall sharpness was better with the old MBP with AMD GPU :-((

Apple, I've reproduced it twice since we last spoke on the phone. I have three videos and two diagnostic reports to send you, but we keep playing phone tag with each other. Can you please tell me how and where to upload these 300MB files?

So having this same issue on my MBP 2019 immediately after upgrading to Monterey. Interestingly - the reason I upgraded to Monterey was because my 2021 MBP was on it's way and I wanted the OS to migrate to the new machine and be jammin' with all the latest and greatest when it arrived and I migrated to the new machine. So for about a week I could not use my second monitor on my 2019 MBP (frustrating). New 2021 Machine arrived about 4 days ago - I migrated using Migration Assistant - and this new 2021 MBP is NOT having any issues with my second monitor. Don't know if that could be helpful info for Apple and not sure the following would either, but the USB-C ports on the 2019 were always finicky - I only had that machine for about 3 months - and during that time I had to buy a new USB-C hub, my previous MBP (now 3 machines ago) didn't have any problems with that hub. The 2019 did. I found the USB-C ports on the 2019 were extremely tight. Like when I would plug that new hub in, it took a little extra pull to get it back out.

Nope, it initially worked with Monterey. Then just stopped. My wife's MBP with Catalina connects fine. I have tried every suggestion and it just won't work anymore. Very odd that it did work fine initially (although I had to do the sleep/wake trick once when it didn't automatically connect).

This is killing my productivity.

Cannot even begin to describe my frustration. Have been using an external Sony flatscreen TV linked via HDMI to my Macbook using a dongle (since there's only one USB-C port on this Mac) as an external viewing monitor for years. Now with the latest OS update (Monterey) the external screen is black. So now I either have to figure out how to go back to Big Sur or otherwise.... what? New screen? I cant use a new HDMI to USB-C cable since that would take up my only port and preventing the Mac to be connected to power. Suggestions?