I have connected 2 external monitors to my MacBook Pro M4 with Unisynk 9-port dock through HDMI. The dock is attached to computer with USB-C. MacBook won’t detect monitors as 2 separate ones but as 1 together. Is there any other way to get MacBook understand that those are individual monitors than attaching the other one directly to MacBook?
[Re-Titled by Moderator]
MacBook Pro 14″, macOS 15.1
jukkathefinnishflash wrote:
I have connected 2 external monitors to my MacBook Pro M4 with Unisynk 9-port dock through HDMI. The dock is attached to computer with USB-C. MacBook won’t detect monitors as 2 separate ones but as 1 together. Is there any other way to get MacBook understand that those are individual monitors than attaching the other one directly to MacBook?
Is that "Unisynk 9-port dock" a Thunderbolt dock?
My bet is that it isn't – and that is the problem. Macs only support connecting two displays to a single dock, in a hardware-supported way, when
Thunderbolt provides an extra-wide "data highway" and the Mac wants to see that extra-wide highway before it's willing to provide two video signals – even if the two monitors in question are low-resolution ones.
Here's what I found on the Unksynk site:
Unisynk – 9 Port Dual Display USB-C Docking Station
Under Compatibility it says,
"Designed to use mainly with PC laptops. Make sure the USB-C port on your device supports DisplayPort protocol for video. Supports PowerDelivery protocol. Support for HDR, DSC, HDCP 2.3, MAC pass-through and PxE-Boot. Works with Macbook but only duplicates the screen when using both HDMI."
My guess is that this dock uses the equivalent of DisplayPort MST daisy-chaining to drive the second HDMI output. Macs don't support that. The other possibility is that it uses a second-class workaround like DisplayLInk to do so – which would require the installation of a special driver and the compromises that come with that.
You need to plug one of your monitors directly into the MacBook – or to get a better dock.
Now that you have vented, I hope you are feeling better.
If you want personalized attention to your specific issues, please start a NEW discussion, and mention exactly what model MacBook Pro and what processor {(plain) PRO, MAX}, and what make&model displays.
what processor on your MacBook Pro?
{ULTRA MAX PRO [plain] } ??
The latest M4 (10C CPU / 10C GPU)
I will open my own thread, sorry to hijack this one
And just like that it started working again after 100 retries...
Me? No I just returned my pro-chip for a max-chip and haven’t had a problem since.
Bizzare…but glad it is back working for you.
i was told by support this is a known issue, two monitors don't seem to work correctly (have M4 pro with pro chip). I tried TB5/TB4/HDMI adapater/DP cable all rated for 4k/240hz, but only one monitor would pick up at a time, even at 1080p 60hz and lid closed. they said expect an update but not sure when...speak to support and get your case added to the larger case so they can get this expedited and fixed - its' annoying as **** and i've spend a few hundred testing on TB4/TB5 docks from OWC and various 'will work' cables from Amazon. My M1 pro chip works perfect at 100hz to both monitors *Asus PG32UCDM*.
My new Macbook PRO M4 STOPPED recognizing my external Monitor. Worked for the past 2 months with no problems.
I used my computer with another HDMI cable connected to a projector and it worked great.
I came home, and now my External Monitor is no longer being recognized.
With or Without an external hub.
With the internal HDMI plug....I have tried everything....
Sometimes it works other times it does not.
More often does not work
I even got it to recognize the Same external Monitor Twice - once with the internal HDMI and with a HUB>
I have tried Resetting everything......NVIDIA, PR, sometimes it works for once -goes to sleep no recognition when it wakes.
help....is it related to the recent update last week????????
Howard
PLEASE HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
My 2017 MacBook Pro worked great with the external monitor.
Why won't my MacBook Pro M4 detect Two Monitors?
