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Hi,
I have a MacBook Pro M1 Max connected to a Thunderbolt 3 dock station (via the thunderbolt 4 port on the Mac ) where 2 displays are connected on via DisplayPort (1920 x 1080).
But only 1 display is working while M1 Max is supposed to support three external display.
Does anyone have an idea why ?
Do the screens have to be connected on a separate port on the Mac directly ?
Thanks,
MacBook Pro Apple Silicon
The MAC only supports multiple displays on one cable when that genuine ThunderBolt cable is connected to a genuine Thunderbolt device (Dock or Display) as the first device.
In my opinion, that Dock is mostly a USB-C Dock, with some available ThunderBolt features available when running selected Windows Drivers.
The MAC only supports multiple displays on one cable when that genuine ThunderBolt cable is connected to a genuine Thunderbolt device (Dock or Display) as the first device.
In my opinion, that Dock is mostly a USB-C Dock, with some available ThunderBolt features available when running selected Windows Drivers.
Hi biglab2,
Welcome to Apple Support Communities. Some guidance to help you with this external display issue can be found in the Apple Support article: If your external display isn't detected or appears blurry when connected to your Mac
If your display is blank or not detected
Try these steps if you don't see an image on your display.
Check your cable or adapter
Disconnect the cable from your external display from your Mac, then reconnect it. If the cable from your external display doesn't connect to the ports on your Mac, you can use a USB-C or Thunderbolt adapter. If you're using a USB-C or Thunderbolt adapter to connect a display, the adapter must be compliant with DisplayPort Alt Mode or Thunderbolt / USB 4.
Check how many displays you can connect
If you're connecting multiple displays to your Mac, use the Tech Specs page to find out how many external displays your Mac supports.
1.Choose Apple menu > About This Mac, double-click your serial number, then press Command-C to copy it.
2.Go to the Tech Specs page, click the Search Tech Specs bar, press Command-V to enter your computer's serial number, then click Search.
3.Click the specs page for your Mac. The number of displays your Mac supports appears under Video Support or Graphics.
If this trouble persists, get in touch with Apple Support for additional assistance:
We hope this helps you.
Hi Grant,
the dock model is an HP thunderbolt G2 120w (thunderbolt 3)
The cable is the original embedded thunderbolt 3 cable)
And yes the two monitor is working fine. I also use the dock with an HP computer
That Dock provide full ThunderBolt support only HP computers, and only running Windows operating system.
MULTI-FUNCTION MODE
The HP Thunderbolt Dock G2 can connect to systems without Thunderbolt™ through multi-function mode.
There are three main differences between ThunderboltTM mode of the HP Thunderbolt Dock G2 and multi-function mode.
• The ThunderboltTM port on the back of the unit will degrade to USB2 only.
• The ThunderboltTM port is only fully functional with a ThunderboltTM host connected.
• The number of independent video streams is decreased from two DP x4 to one DP x2.
The HP Thunderbolt Dock G2 may require updates to your host platform software or firmware to support the new technologies.
https://support.hp.com/us-en/product/hp-thunderbolt-dock/20075223/model/20075224/manuals
Footnote 3: OS and systems compatibility: The HP Thunderbolt Dock G2 is designed to USB Type-C
charging and port replication for notebooks that have implemented USB-C™ and Thunderbolt™ industry specifications. Certain features of the dock are not functional when used with non-HP systems nor Chrome systems:
1) Power button to turn on or wake the system
2) Wake on LAN from warm and cold dock
3) Wake on LAN from S4/S5
4) MAC Address Pass Through S0, S3, S4, S5 warm and cold dock
5) Ethernet and audio drivers need to be installed separately on non-HP Windows systems for headset auto switching functionality
Drivers available on HP website
6) For MAC PCs HP does not provide ethernet and audio drivers
7) Firmware updates on Window-based host systems only
what Make & Model dock?
is it connected with a genuine ThunderBolt cable, not just a USB-C cable?
if you disconnect the first one, does the second one start working? did the second one EVER work?
Big thanks Grant. I hadn't seen those details on the HP site for this dock.
Thank you very much for the precisions.
One of two Display on thunderbolt 3 dock connected to M1 Max is not showing
