Macbook to G9 OLED via (M)HDMI to Plugable UD-4VPD only 60hz?

Hi All,

Macbook Pro - Ventura 13.5 - Samsung G9 Oled

Has anyone been able to get 120HZ+ on a Macbook pro using a MHDMI to HDMI or HDMI to HDMI?

When connecting directly to the laptop from the monitor using a Display Port to USBC cable, I'm able to achieve 120hz with 5120x1440 resolution

With a MHDMI or HDMI cable in to the dock I'm only about to achieve 60hz and the abillity to change my resolution is limited.


Thank you for contacting us, I am sorry this is not working as expected.

I was able to reproduce this behavior with the UD-4VPD docking station with a 4K 120Hz television being limited to 60Hz. This also affects USB Type-C DisplayPort Alternate Mode 1.4 to HDMI 2.1 adapters and appears to be a limitation within macOS when connecting a high-refresh rate HDMI display to the computer via USB Type-C. As you noted, connecting with a USB Type-C to DisplayPort input on the display should not encounter this limitation.

I tested systems from a 2019 MacBook Pro with Intel processor, M1, and M2 MacBook Pro 13-inch and Air systems, 15-inch MacBook Air M2 and 16-inch MacBook Pro M2 with native HDMI output, all showed this behavior when connecting to a USB Type-C to HDMI adapter or docking station. The 16-inch MacBook Pro with M2 was able to support 4K 120Hz with the built-in HDMI output port.

To ensure the test setup had compatible cables and there were no hardware limitations I tested all adapters and the docking station using a Surface Laptop 5 which enabled 4K 120Hz for all adapters and UD-4VPD docking station tested.

I am sorry, this is a limitation in Apple systems independent of the Apple specifications and we will be updating our compatibility statements to reflect this behavior.

I can help to return this docking station for a full refund.

Please send an email to with the subject line “Ticket #412238 - Attention Pat” and we can start the refund process.

Thank you, and I apologize for this inconvenience.

Plugable Technology


We’re closing this thread due to inactivity, but if you have any further questions please feel free to contact and we’ll be happy to help.


Plugable Technologies