MacBook Pro, Mini DisplayPort to HDMI and 2560x1440



I have a question about and the notes about Apple. It says

“This adapter works for display (without audio) up to 1920×1080 on Apple Thunderbolt ports”

My setup is

* MacBook Pro, 15-inch Early 2011
* Dell U2515H

while I’m not trying to achieve 4K, I do want 2560x1440 @ 60 Hz over HDMI.

I get 2560x1440 @ 60 Hz when connecting the MBP and U2515H with an miniDP-DP cable, but the reason I want to use HDMI is that I want to place the computer in another room, so I have an HDMI cable (“hi-speed active”) of 10 meters. That cable works well as I used it with my previous monitor, Dell U2410.

I have an old Mini-DisplayPort to HDMI adapter (Moshi,…, “HDMI v1.3 compliant supporting Full HD display at 1080P”) which only gives me 2048x1152.

So my questions is, will the Plugable mDP-HDMI active adapter give me 2560x1440 @ 60 Hz over HDMI?


Hi Patrik,

Thanks for posting!

I would not suggest using our active mDP adapter along with an active HDMI extension cable - it’s generally only advisable to have one “active” cable/adapter in a connection chain.

So although it won’t meet your needs for display distance, your best bet for things to work properly is to continue to use a mini-DP to DP cable.

Hope this helps clarify!

Best wishes,