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A comment on M1 Macs cannot support dual Extended displays through their Thunderbolt 3 ports. Parent comment

Re:M1 Macs cannot support dual Extended displays through the... by audunw on Thursday January 07, 2021 @03:56AM (#25668826)
> I think we reached peak multiscreen ~2010 and it's sort of falling out of favour these days

When we upgraded monitors at work I took several of the old ones to see how many monitors I could connect. I got up to 5 I believe (with one being a new ultrawide). It was impossible to use them all productively. At best they could serve as live status for some Jenkins job. Two monitors are useful, but now you can just use one ultrawide (I like to use two cables since it makes Window management easier, but you can use software for that too). I like to have one extra in addition to an ultrawide, but it's often unused.

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Re:M1 Macs cannot support dual Extended displays through the... by jacquesm on Thursday January 07, 2021 @05:35AM (#25669484)
I use tripe 4K monitors all the time and it's a very productive setup. Left is video conference, far enough away that I can use it without glasses if I want to, front is development work, browser, email, right is the live view of the application that I'm working on. And at $500 each the price really isn't an obstacle if you are using them professionally.
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Re:M1 Macs cannot support dual Extended displays through the... by twic on Thursday January 07, 2021 @04:52AM (#25669218)
> It was impossible to use them all

You could always take up trading:

https://library.tradingtechnologies.com/trade/ttd-managing-a...

> ... productively.

Oh well.

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Re:M1 Macs cannot support dual Extended displays through the... by theodorton on Thursday January 07, 2021 @04:36AM (#25669114)
I use Spectacle for window management on a 49" ultrawide and it works great for dividing the screen into 3 segments. Having one window centered helps avoiding too much horizontal movement of my neck as well (which I've been recommended to avoid by a physiotherapist).
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Re:M1 Macs cannot support dual Extended displays through the... by showsover on Thursday January 07, 2021 @03:59AM (#25668845)
Can you go into more detail as to how using two cables makes window management easier on a single ultrawide?
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Re:M1 Macs cannot support dual Extended displays through the... by kuschku on Thursday January 07, 2021 @04:07AM (#25668902)
Most environments snap windows to borders of logical screens.

If the OS believes the ultrawide is actually two 4:3 monitors, you'll get one such snapping range right in the middle.

If you connect the monitor with one cable, the OS believes it's one single 21:9, but if you connect them with two cables, the OS believes it's two smaller monitors.

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Re:M1 Macs cannot support dual Extended displays through the... by hashhar on Thursday January 07, 2021 @06:26AM (#25669815)
Is this true for just MacOS or do Linux (GNOME specifically) and Windows also work the same way?

I don't know anyone with an ultrawide so I can't try this myself.

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Re:M1 Macs cannot support dual Extended displays through the... by kuschku on Thursday January 07, 2021 @01:25PM (#25675077)
All of them work like this, but some linux environments and on windows PowerToys Zones support splitting the screen in different, custom ways.
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Re:M1 Macs cannot support dual Extended displays through the... by lozaning on Thursday January 07, 2021 @07:31AM (#25670279)
Windows also works this way, IDK about linux. FWIW Samsung's ultra wide monitors are supposed to support splitting the screen up into multiple areas for the purpose of window management, even when using a single cable.
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