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deconstruct60

macrumors G5
Mar 10, 2009
12,493
4,053
Hi all. I have a new Mac m2 with usb c sockets. I also have 2 monitors. If I purchase a second Laptop docking station (same as https://www.amazon.co.uk/Docking-Station-Adapter-Multiport-MacBook-Gray-10-1/dp/B08MT3PKBB) will i be able to run the 2 monitors as EXTENDED displays, hence allowing my video edit software much better screen space (Davinci Resolve).

Hope that description was clear enough!
Peter

Two docking stations are not necessary to connect two displays. If this Mac laptop has a magSafe even the need for one (to do both power pass-thru to the laptop and get display out through the same port at the same time. ( presuming the monitor can't pass in power). [ For a Mac M2 Mini even less need. ]

If there just two ports only, then you need both power in and video out on a single port. A docking station helps provision up that 'two way street' solution.


For second one there shouldn't be a "how do I power the laptop" issue anymore so another one's utility is what? But for a Mac laptop with an embedding displays the overriding problem is that there is more more display controll 'output' to hand out. (there is a chip limit).


If you are thinking " there are two video plugs on the docking station so I can plug in two monitors" ... I doubt that works. ( the product page says "mirror". The single video stream out the port it likely just duplicated in the dock.). Also doesn't particularly work single port on other more robust docs either.

Caldigit SOHO
"... *macOS does not support MST (Multi-Stream Transport), a requirement in order to offer dual extended monitors via USB-C ..."

Caldigit Thunderbolt 3 Plus : see " Monitor Resolutions" on this page:

It would be possible to run two 1080 (or so ) monitors out through a single MST DPv.1.4 feed if Apple supported that ... but they do not.


If willing to take on overhead of 'virtual display controller' and use DisplayLink, then something like


[ Effectively a 'virtual display controller' pushes the data out over USB 3.x protocols to special adapters. Bypasses the hardware limit but adds resource consumption overhead. ]


The M3 has the exact same two DP stream output limit. For Apple this is a 'feature' not a 'bug'. It is probably not going away any time in the next several generations on the 'plain' Mn SoC.




P.S. Pragmatically have two monitors if have an external monitor and an embedded Macbook one. They are just not the same size. DaVinci Studio version can send the "video clean feed " to a second screen as a full sized preview. If take 'preview' out of tools, timeline , etc screen there is more room for that stuff.
 
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iStorm

macrumors 68020
Sep 18, 2012
2,034
2,441
Which Mac do you have? I'm going to assume you have a MacBook since you referenced a laptop docking station. Also, for clarity, which chip do you have...the M2, M2 Pro, or M2 Max?

If you just have the regular M2 chip, then you're out of luck as that one only supports one external display. You would need the M2 Pro (supports up to two external displays) or the M2 Max (up to four external displays).
 

PeterGroom

macrumors newbie
Original poster
Nov 15, 2023
3
0
HI
Thanks for the extremely comprehensive answers. Its a M2 Pro (the Pro being more by luck than design!)
I have a lot of reading to absorb the detail you have provided but thanks so much!
Peter
 

meson

macrumors 6502a
Apr 29, 2014
516
511
With the M2 pro, you can run two displays in addition to the builtin display on a laptop or three external displays on a mini or studio.

As alluded to, Apple will only let you run one display per thunderbolt/usb c or hdmi port up to the maximum number of supported displays. You can run one display through a port on your docking station. The other will need to either connect directly to the Mac via one of the other thunderbolt/usb c ports or via the hdmi port. You could connect the second display to another hub or docking station, but it is not necessary. A simple usb c to DisplayPort or hdmi dongle or an hdmi to hdmi cable will work just fine.

If you really want to insist on connecting the displays, power, and accessories through a single cable, then you will need a Display Link capable hub and run the Display Link software on your Mac. I've never used one, but as noted there will be some compromises going this route such as the displays operating at lower refresh rates, more cpu/gpu resources being used, etc.
 

PeterGroom

macrumors newbie
Original poster
Nov 15, 2023
3
0
With the M2 pro, you can run two displays in addition to the builtin display on a laptop or three external displays on a mini or studio.

As alluded to, Apple will only let you run one display per thunderbolt/usb c or hdmi port up to the maximum number of supported displays. You can run one display through a port on your docking station. The other will need to either connect directly to the Mac via one of the other thunderbolt/usb c ports or via the hdmi port. You could connect the second display to another hub or docking station, but it is not necessary. A simple usb c to DisplayPort or hdmi dongle or an hdmi to hdmi cable will work just fine.

If you really want to insist on connecting the displays, power, and accessories through a single cable, then you will need a Display Link capable hub and run the Display Link software on your Mac. I've never used one, but as noted there will be some compromises going this route such as the displays operating at lower refresh rates, more cpu/gpu resources being used, etc.
Thats great thank you. So my 2 displays are VGA/ DVi in.. It would seem that if I use the Docking station (which has a VGa on it) to connect to 1 screen, and the other I connect using a usb c - VGA cable that I just found, and set to Extended - I should be good to go!
 

Aggedor

macrumors 6502a
Dec 10, 2020
799
939
Thats great thank you. So my 2 displays are VGA/ DVi in.. It would seem that if I use the Docking station (which has a VGa on it) to connect to 1 screen, and the other I connect using a usb c - VGA cable that I just found, and set to Extended - I should be good to go!
How old are these monitors? They might look pretty rough under macOS.
 

meson

macrumors 6502a
Apr 29, 2014
516
511
Thats great thank you. So my 2 displays are VGA/ DVi in.. It would seem that if I use the Docking station (which has a VGa on it) to connect to 1 screen, and the other I connect using a usb c - VGA cable that I just found, and set to Extended - I should be good to go!
That should work just fine.
 
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