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I have a Macbook pro from 2011 running Mac os X El Capitan version 10.11.6 with the following technical specification:

Processor: 2,2 GHz Intel Core i7
Memory: 8 GB 1333 MHz DDR3
Graphic card: AMD Radeon HD 6750M 512 MB

What I'm trying to do is to connect 2 external monitors to my Macbook so I can get a "Extended display-mode". The only input port that my Macbook is supporting is Thunderbolt/Minidisplay port.

So what I did was to purchase a Displayport MST-Hub with a Thunderbolt/Minidisplay cable going to the port of my Mac and then I tried to connect one external monitor to that Hub throughout a HDMI-to-Displayport adapter-cable. But somehow I got screen flickering on the external monitor and it just steadily turned on and off.

So Im wondering what am I doing wrong here and have any of you managed to actually successfully connect multiple external monitors to an older Macbook pro in a Extended-mode (not mirrored).

I'm truly grateful for all of your tips and advices here.

PS! I have already tried another solution which was to purchase a graphic card adapter to connect with USB to my Macbook and then connect my external monitor with HDMI to the adapter. I actually got my desktop showing up on the external screen but it was a very low frequency so it was annoying to use.

Erfan Tavoosi
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1 Answers1

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I think you might be stuck.
Basically, the 2011 MacBook Pro only supports one external monitor.
Source: EveryMac

macOS doesn't support MST, so you'd need a dedicated output for each.
El Capitan doesn't support eGPUs.
Your Mac can't run Mojave, which is minimum requirement for an eGPU.

Tetsujin
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