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The M1 mini does support dual monitors. The laptops only support one external in addition to the internal display.
Actually the problem is, the M1 does not support three monitors. The M1 Mini and all the M1 laptops support two. Most people forget to count the internal monitor on the laptops. (I know, the laptops don't support two EXTERNAL monitors but all that takes is one simple mistake with a hammer to fix.)

Edited to say, I was just about to get a couple of ultrawides form my M1. I guess I will put it off a bit.
 
Actually the problem is, the M1 does not support three monitors. The M1 Mini and all the M1 laptops support two. Most people forget to count the internal monitor on the laptops. (I know, the laptops don't support two EXTERNAL monitors but all that takes is one simple mistake with a hammer to fix.)

Edited to say, I was just about to get a couple of ultrawides form my M1. I guess I will put it off a bit.
Unless you have been under a rock, there has been numerous reports of issues with external displays with the new M1 Macs... with ultra wides being the most problematic of them all.

People have probably bought more adapters than you can shake a stick at trying to get their displays to work with the new M1s... only to discover, it was the M1 Macs all along that had the issue. Apple told them it was their device or adapter was the problem... or that it was outright unsupported... until that molehill turned into a mountain of complaints and returns.

M1 Macs aren't the shiny wonder kids all the streamers made them out to be. They have issues whether anyone wants to admit it or not. And remember... Apple will be the last to admit anything. And they just admitted they have a problem... a problem any streamer should have caught because every user out there did.
 
Is there any reason apart from aesthetics to have one of these monitors and not just place two ordinary monitors side by side?
I have one for development and I don’t want to go back. First of all there are many apps that have tool panels to the left and/or right. With such a monitor you can just leave these open and still have plenty of space in the main working area. Video editors, mock-up tools like Adobe Xd and Sketch, or coding environments such as Visual Studio or Xcode work beautifully in single wide window mode.

But even if you could split up thing’s into several windows and distribute over several monitors, not having the bezels between your windows is so much calmer. At least for me.

And while I hardly use it, Excel ... some people push huge worksheets to me. Such a pleasure to use them without having to scroll all the time.

But it may not be everybody’s thing. Many of my dev colleagues have three monitors, with at least one tilted into portrait position, since code is better handled narrow but stacked vertically.

Oh and forgot to say: some movies match the aspect ratio spot on. Very immersive (but we have a projector and 104” screen - thus, hardly use the monitor for movies, but if I would, the wide ratio would be a major benefit 😀)
 
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M1 doesn't support dual monitors.
Yes it does. The details depend on the monitors you want to support, and you will need a bunch of dongles, but at least 6 monitor support is possible via a DisplayLink intermediary. Good enough for many purposes, not for others.

 
My super ultra wide was working fine at full resolution on M1BA after a couple tries and then out of nowhere stopped working at 5420x1440 resolution. It works with SwitchResX but just strange why it stopped working.
For those who wonder why these super wide screens, the pixie dust is that you can plug 2 outputs to 2 inputs and voila! You’ve got 2 screens virtual desktops “glued” together with no in middle bezzle completely independent. Sadly this doesn’t work other than M1 Mini.
 
Actually the problem is, the M1 does not support three monitors. The M1 Mini and all the M1 laptops support two. Most people forget to count the internal monitor on the laptops. (I know, the laptops don't support two EXTERNAL monitors but all that takes is one simple mistake with a hammer to fix.)

Edited to say, I was just about to get a couple of ultrawides form my M1. I guess I will put it off a bit.
For most of us the problem is that M1 notebooks don't support any two displays, ie. we can't use it in clamshell mode with two monitors.
 
Is there any reason apart from aesthetics to have one of these monitors and not just place two ordinary monitors side by side?

1 stand
1 power cord
1 thunderbolt cable
1 set of speakers

in addition to the afore mentioned no bezel, window placement flexibility, smoother workflow. Now that a decent ultrawide can be had for ~$500 it's hard to argue against it.
 
Raised this issue with the DTK for ultra wide screens a long while ago, granted mine is only 3840x1080 49" but can run at 144Hz Stuck in 60Hz on the M1 MBP.
 
Is there any reason apart from aesthetics to have one of these monitors and not just place two ordinary monitors side by side?

I don't have to worry about matching display colors and brightness if there's only 1 monitor to deal with. If you're a photographer and you use your monitors like this, then you'd know that sometimes you have to pay $1000+ for each monitor to be able to get them to match perfectly without having to calibrate them individually.

Also, 1 monitor means I don't have to deal with a messy hub setup. The LG 34WK95U does almost everything, for example: 5120x2160 resolution, Thunderbolt 3 that delivers 85W power, supports DCI-P3, supports HDR, has USB 3.0 ports for outputs, and can also split into 3840x2160 + 1280x2160 or 2560x2160 + 2560x2160 screens if I need it to, so it can still be used like 2x monitors for 2x different computers. I actually do use it like this quite often when I need to access something on my Raspberry Pi 4 or Windows laptop.

And in MacOS, currently we can't seem to go above 6K horizontal resolution:
bGpfZ9K.png


I hope Apple can address this soon. Then the M1 will be the perfect setup for me.
 
Interesting... didn't know about this. I'm fortunate I haven't run into any issues on my Mini w/ my LG34UC98 UW (via Thunderbolt).
 
I didn't realize this was an issue. Mine works fine at 3440x1440, but it is only at 60Hz. Maybe that's why I'm not having issues.

I love ultra wide monitors, though.
 
Unless you have been under a rock, there has been numerous reports of issues with external displays with the new M1 Macs... with ultra wides being the most problematic of them all.

People have probably bought more adapters than you can shake a stick at trying to get their displays to work with the new M1s... only to discover, it was the M1 Macs all along that had the issue. Apple told them it was their device or adapter was the problem... or that it was outright unsupported... until that molehill turned into a mountain of complaints and returns.

M1 Macs aren't the shiny wonder kids all the streamers made them out to be. They have issues whether anyone wants to admit it or not. And remember... Apple will be the last to admit anything. And they just admitted they have a problem... a problem any streamer should have caught because every user out there did.
Be careful with assuming someone saw something. I follow a lot of Apple news and even I don’t remember reading about the Ultrawide display issue.

Also, this one issue along with other minor things doesn’t make the M1 Macs suck. They still embarrass an entrenched industry.
 
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M1 Macs aren't the shiny wonder kids all the streamers made them out to be. They have issues whether anyone wants to admit it or not.
It's a first gen new product, who would have thought it could have some issues! Never ever happened before on the rest of Apple's 1st gens...
 
Macs are absolute garbage when it comes to external displays for me. Even with my new Mac Pro with a maxed out GPU, when I have 3x 4K displays, it will randomly drop 1 or more of the displays to 30hz every now and then and even a reboot often won't fix it. This has been happening for years and it still hasn't been fixed on Big Sur...WTF apple? This is something that both Windows and even many Linux distros manage to get right without a problem....
 
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Looking forward to this update. I'm curious if anyone has been able to run the M1 Air at 3440x1440 at 144hz natively in macOS.
Most likely no. I don't know what they are doing with those resolutions and why they made it so complicated.
 
I have been running a Dell U3419W @ 3440 x 1440 with my M1 MBP for a month with no issues. Connected by USB-C it charges the MBP, serves as a USB hub and provides audio via the built in speakers.
 
Is there any reason apart from aesthetics to have one of these monitors and not just place two ordinary monitors side by side?
I would prefer to have one big screen, so I can use my custom window-placing gestures (left, right, top-left, bottom-right, etc). Unfortunately it's pretty hard (maybe even impossible) to find a display that is double 4k (7680x2160), so I'm using two 4k Dells instead.
 
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