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tobo78

macrumors newbie
Jan 22, 2018
4
0
The only setup that works that I'm aware of is via a Thnuderbolt 3 dock. Most have a DP out and a Thunderbolt out. Then you connect one to the DP out, and the other to the Thunderbolt out via a USB-C to DP cable.

this is not MST.. MST is PC -> Monitor1 -> Monitor2. Not PC -> Monitor1, PC -> Monitor2.
 

ny3ranger

macrumors regular
Feb 10, 2008
106
0
this is not MST.. MST is PC -> Monitor1 -> Monitor2. Not PC -> Monitor1, PC -> Monitor2.

Isn't using a hub more like PC -> Hub -> Monitor 1, Hub -> Monitor 2; Also isn't the same MST technology needed to use a Hub? Really would like to connect two monitors using DisplayPort coming out of Thunderbolt 3 port from my 13" 2017 MacBook pro; using any hub. Anyone know any hub that's dual DisplayPort output to extend two displays? Finally, I read that if you connect two external displays to 13" pros, the laptop display blanks out. Is this true? Ideally, I would like to use my laptop screen along with two external displays that are connected via their DisplayPort (using a DisplayPort hub).
 

tobo78

macrumors newbie
Jan 22, 2018
4
0
Isn't using a hub more like PC -> Hub -> Monitor 1, Hub -> Monitor 2; Also isn't the same MST technology needed to use a Hub? Really would like to connect two monitors using DisplayPort coming out of Thunderbolt 3 port from my 13" 2017 MacBook pro; using any hub. Anyone know any hub that's dual DisplayPort output to extend two displays? Finally, I read that if you connect two external displays to 13" pros, the laptop display blanks out. Is this true? Ideally, I would like to use my laptop screen along with two external displays that are connected via their DisplayPort (using a DisplayPort hub).

this is the schema:
https://lnv.i.lithium.com/t5/image/...DFB7F504B072085/image-size/large?v=1.0&px=999

If you can see, there is the only one output from the computer. This is working only on windows. macos not working at all at this setup. macbook only on windows using bootcamp.

I'm using this one:
https://www.i-tec-europe.eu/index.php?t=3&v=480

there is more of those on the market...
https://www.startech.com/AV/Converters/Video/thunderbolt-3-to-dual-displayport~TB32DP2T


This is my setup: 2 external displays (extend mode) and the laptop...
 

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parseckadet

macrumors 65816
Dec 13, 2010
1,296
859
Denver, CO
this is not MST.. MST is PC -> Monitor1 -> Monitor2. Not PC -> Monitor1, PC -> Monitor2.
That’s not quite the solution I meant. What I proposed was PC -> Hub, Hub -> Monitor1, Hub -> Monitor2. So there’s only one wire connecting the Mac to everything.

If that’s not good enough then I’m not sure what to tell you. This entire thread is about the fact that MacOS doesn’t support MST. You asked for a solution to connect multiple monitors and I gave you one. The way I took your question was that you were looking for an alternative means of connecting multiple monitors without needing MST, since it’s not supported. If you’re dead set on using MST then it’s not going to happen.
[doublepost=1517688657][/doublepost]
this is the schema:
https://lnv.i.lithium.com/t5/image/...DFB7F504B072085/image-size/large?v=1.0&px=999

If you can see, there is the only one output from the computer. This is working only on windows. macos not working at all at this setup. macbook only on windows using bootcamp.

I'm using this one:
https://www.i-tec-europe.eu/index.php?t=3&v=480

there is more of those on the market...
https://www.startech.com/AV/Converters/Video/thunderbolt-3-to-dual-displayport~TB32DP2T


This is my setup: 2 external displays (extend mode) and the laptop...
This isn’t MST either. So according to the tone of your previous post it doesn’t satisfy your requirements.
 

tobo78

macrumors newbie
Jan 22, 2018
4
0
That’s not quite the solution I meant. What I proposed was PC -> Hub, Hub -> Monitor1, Hub -> Monitor2. So there’s only one wire connecting the Mac to everything.

If that’s not good enough then I’m not sure what to tell you. This entire thread is about the fact that MacOS doesn’t support MST. You asked for a solution to connect multiple monitors and I gave you one. The way I took your question was that you were looking for an alternative means of connecting multiple monitors without needing MST, since it’s not supported. If you’re dead set on using MST then it’s not going to happen.

solutions are out there... I'm using one....

I'm just saying, that it is quite confusing, that apple is step behind microsoft on their own HW...

they lowered the number of connectors on their HW and not implement technologies that lowers the number of needed phydsical connectors...

we have to rely on third party dolutions...
 

keefrox

macrumors newbie
Feb 8, 2018
1
0
i'm currently using a early 2015 MBP 13" with the dual thunderbolt 2 (mini DisplayPort) ports, and an HDMI. i use BENFEI cables that are mini DisplayPort to DisplayPort on my 27" GW2765 monitors. they are both running 2560x1440 resolution @ 60hz, which is the max allowable resolution the video card will support. i paid $7-$8/piece for the cables from amazon. hope this helps some people.

p.s. it's probably important to specify these are bi-directional cables, also referred to use active as opposed to passive.
 

DelGurth

macrumors newbie
Jun 8, 2017
8
3
i'm currently using a early 2015 MBP 13" with the dual thunderbolt 2 (mini DisplayPort) ports, and an HDMI. i use BENFEI cables that are mini DisplayPort to DisplayPort on my 27" GW2765 monitors. they are both running 2560x1440 resolution @ 60hz, which is the max allowable resolution the video card will support. i paid $7-$8/piece for the cables from amazon. hope this helps some people.

p.s. it's probably important to specify these are bi-directional cables, also referred to use active as opposed to passive.

And why would this be of any help? Does this magically fix the lack of display port daisy chaining within macOS?
 

ActionableMango

macrumors G3
Sep 21, 2010
9,610
6,891
Did somebody try the latest 10.13.4 betas? I have an MST hub and it works just fine on Windows 10 but no luck with High Sierra 10.13.3

You might be able to enable MST on your Nvidia GPU laptop. It has to be kepler (600 series) or newer, you have to install the Nvidia web driver, and you have to enable spanmodepolicy at the command line.

Google "MST spanmodepolicy" or something like that for details. Don't ask me because I haven't done it myself, I'm just aware that others have enabled MST for Nvidia.

I say "might be able to" because these guys are doing it for 5K monitors that require MST. Just because that works doesn't mean MST daisy chaining will work. But it seems worth a try.

Also every single time there is a MacOS update, no matter how small, you will also need to update the Nvidia driver, and they lag the MacOS update by a couple of days.
 

ParanoidDroid

macrumors 6502
Sep 15, 2013
343
561
Venusville, Mars
You might be able to enable MST on your Nvidia GPU laptop. It has to be kepler (600 series) or newer, you have to install the Nvidia web driver, and you have to enable spanmodepolicy at the command line.

Google "MST spanmodepolicy" or something like that for details. Don't ask me because I haven't done it myself, I'm just aware that others have enabled MST for Nvidia.

Thanks. I'm trying to get MST to work with an USB-C to 2x DisplayPort splitter on my MacBook 12-inch (Early 2016) which uses an integrated Intel HD Graphics 515. It does work on Windows 10. But like I said above, in macOS it only mirrors external displays. Since Apple killed DisplayLink docking station support with 10.13.4 I'm looking for alternative to connect to two external monitors via USB-C (3.0 Gen1).
 

LeoCheng

macrumors newbie
Oct 3, 2012
18
0
That doesn't refute my point. And someone earlier linked to a product that is a Thunderbolt 3 to dual-displayport adapter. It was less than $100.

My bad. I was thinking about Thunderbolt 2 dock (as my mac is older), which retails for at least $250. Feel bad for myself. I should upgrade.
 

Befetti

macrumors newbie
Dec 26, 2016
7
0
Perth
The problem with MST is that the operating system needs to support it (like Windows 10 or even, believe it or not, Windows 7). After an Apple support request that recently dragged on for 4 weeks, where Support claimed it did work, eventually an Apple "engineer" confirmed that it is not supported. The cracker is that the Windows installs (bootcamp) that I have on a MacBook 2015 and another on a MacBook 2017 support MST and work 100% with my Dell monitors. So, yes, the problem is not the Intel hardware. Unfortunately, this is where we are with Apple computing.
Oddly enough, I find that I am using Windows 10 more frequently than I used to.
 

jdmc

Contributor
Nov 12, 2018
31
16
Question: doesn't this support thread indicate that MST *is* supported?

https://support.apple.com/en-us/HT206587

Technically, yes, but in that context Multi-Stream Transport is being used to send a 5K@60 video signal to a single display. Such a signal requires more bandwidth than a single "stream" in the DisplayPort protocol can provide, so it must be multiplexed across two DP "streams". DisplayPort daisy-chaining also uses multiple streams, but in a different way, such that multiple target displays can be addressed, with one "stream" assigned to each. This is a feature of the DisplayPort protocol (version 1.2 or later) operating natively on the cables involved, as opposed to being encapsulated within the Thunderbolt protocol. The way that Apple expects you to daisy-chain displays is via Thunderbolt, not via native DisplayPort. Unfortunately, this requires a separate Thunderbolt controller chip for each target display to demux the DisplayPort data from its Thunderbolt encapsulation.

As has been discussed earlier in this thread, this is strictly a software problem; the Windows OS (W10, or even W7) running on Mac hardware supports native DisplayPort daisy-chaining just fine. For whatever reasons, Apple has chosen not to include the same functionality in macOS. (Perhaps Apple has calculated that the potential usefulness of native DisplayPort daisy-chaining functionality would be outweighed by the confusion and support burden that might be involved in helping end-users puzzle out the distinctions between native DisplayPort and Thunderbolt-encapsulated DisplayPort.)

Having said that, I can't help but wonder if the necessary code that enables DP daisy-chaining in Windows or Linux device drivers could be transplanted into macOS via a kernel extension (kext), and made available to end-users who want that functionality badly enough to go looking for it. Such a solution would be of particular interest to owners of all the 2012 Mac mini models, and also of those 2011 Mac minis that feature the Radeon-based discrete graphics support. These computers are entirely capable of driving dual 2560x1440 (1440p/QHD) or 2560x1600 (WQXGA) displays via their one built-in DisplayPort/Thunderbolt connector, but without access to DP MST daisy-chaining, the only way to do this is to use TB daisy-chaining... which has generally meant deploying a pair of (relatively-expensive, and now long-discontinued) Apple Thunderbolt Displays, one piggy-backed to the other. Support for native DP MST daisy-chaining would allow the use of almost any two displays, provided that at least one of them supports that feature — or the use of a single DP MST "hub" that would connect directly to each display, to include even HDMI displays that know nothing of DisplayPort.
 

sp33dygt

macrumors newbie
Apr 2, 2019
1
0
I just can't believe it. It's been an year and a half for now, no claim about it nothing.
 

kemal

macrumors 68000
Dec 21, 2001
1,777
2,035
Nebraska
Equipment:
Two ThinkVision P24h-10 23.8” Wide QHD IPS Type-C Monitors
Lenovo P52 Laptop Windows 10 180?
MBP Late 2016 13" Escape Edition 10.14.5
MB Air 2015 10.14.5

Connect monitors with DP cables in daisy chain configuration. Set first monitor to daisy chain. Connect P52 to first monitor with USB C cable. Windows shows three screens. As expected: laptop screen and two other screens with three independent images. Turn off daisy chaining on first monitor and the two external monitors show the same image. Windows shows two screens. Laptop display and one connected monitor.

Turn Daisy chaining back on. The last monitor is black with either USB C on the Late 2016 MBP or mDP to DP cable with the 2015 MB Air (Switched first monitor input, of course.) Unplugging / re-plugging the last monitor causes the Apple laptops to flicker. First monitor is detected and its screen is shown in System Preferences. Turning Daisy Chaining off on first monitor lets second monitor monitor mirror first.

So, Multi Stream Transport in Mojave? Not yet.
 
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jdiben

macrumors newbie
Jun 10, 2011
1
1
I don't understand why this discussion is still going on when a perfectly reasonable solution was provided over a year ago. Just buy this for $85 and be done with it. That's what I did, it works great, and I haven't looked back since.
StarTech.com Thunderbolt 3 to Dual DisplayPort Adapter - 4k 60Hz - Mac and Windows Compatible - Thunderbolt and USB C Adapter (TB32DP2T)

That's only a "perfectly reasonable solution" if you have thunderbolt 3. For those of us with only thunderbolt 2 it doesn't help
 
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MRisberg

macrumors newbie
Feb 6, 2019
23
10
Stockholm, Sweden
I don't understand why this discussion is still going on when a perfectly reasonable solution was provided over a year ago. Just buy this for $85 and be done with it. That's what I did, it works great, and I haven't looked back since.
StarTech.com Thunderbolt 3 to Dual DisplayPort Adapter - 4k 60Hz - Mac and Windows Compatible - Thunderbolt and USB C Adapter (TB32DP2T)
Well, you might be happy with a solution like that. But it is quite a sad solution compared to when aiming for using a hub with multiple monitor outputs, usb ports, charging, ethernet, etc .. and everything connected through a single Thunderbolt connection.

I recently purchased a HP USB-C Dock G5 because "they" said it was good and compatible with Mac. It wouldn't display separate pictures on both DP outs though. Very sad.
I then went back to purchase the HP Thunderbolt Dock G2, again because "they" said it was even better. It too wouldn't show two separate images from the DisplayPorts.

I'm sad about this as I recently upgraded to a otherwise really nice Thunderbolt and USB-C equipped Mac. I was looking forward to being able to purchase Thunderbolt 3 and USB-C gear as I saw fit. I'm in a state where I can't quite understand what all the fuss is about regarding Thunderbolt and USB-C is about. They have NOT solved any problems for me this last week, only added up to them. I'm so sad about this. Thought I was about to live the modern life when I got my new Mac.

But ...

I'm back on my Mac Pro 2010 again for multi monitor support.

.. until perhaps, maybe someone can point me in a direction of where I can find equipment that really does work (with MacOS).
 
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