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
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*.
I have now bought a Thunderbolt dock (Targus DOCK310 DV4K) and within these 3 days of testing all problems have disappeared.
I have two external monitors (LG 27MR400 27") attached through the dock and everything works just fine 💯
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.
The latest M4 (10C CPU / 10C GPU)
dual port might work on Windows, but only ThunderBolt Docks work for two displays on a Mac.
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.
please post the make&model of each display, so that readers can look at resolutions and interfaces available to make recommendations.
Why won't my MacBook Pro M4 detect Two Monitors?
