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MacBook Pro 13" M1 2020 won't run 2 external monitors of the same config

i've identified the problem i believe, why two external monitors do not work on the MacBookPro 13" M1 2020.

it's your specialised display settings in the control panel.


M1 and M2 have this problem.

Maybe it can be fixed via an update?

I have used multiple connection types, and found a solution via dock and adapter.

Two adapters of the same config (usb-c) DO NOT WORK.


[Re-Titled by Moderator]

Posted on Sep 27, 2022 4:34 PM

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Question marked as Top-ranking reply

Posted on Sep 27, 2022 6:26 PM

The 2020 Apple-Silicon M1 13-in MacBook Pro and Air and 2022 Apple-Silicon M2 13-in MacBook Pro and Air are extremely-capable entry-level computers. They can support the internal display AND an External display up to the previously unheard of size of the Apple 6K display at billions of colors. But only ONE in addition to the internal display.


This may not match the way older computers forced you to work, since older computers were not able to support a really large external display. But it is NOT a defect. The spec was available long before you could purchase the computer.


The Apple standard for its built-in hardware-accelerated displays, makes them suitable for full-motion video for production/display of cinema-quality video with NO dropped frames, and NO dropouts or partial-blank scan lines due to memory under-runs or other issues. This requires a hardware rasterizer/display-generator for each fully-accelerated display. 

1 reply
Question marked as Top-ranking reply

Sep 27, 2022 6:26 PM in response to george-howell

The 2020 Apple-Silicon M1 13-in MacBook Pro and Air and 2022 Apple-Silicon M2 13-in MacBook Pro and Air are extremely-capable entry-level computers. They can support the internal display AND an External display up to the previously unheard of size of the Apple 6K display at billions of colors. But only ONE in addition to the internal display.


This may not match the way older computers forced you to work, since older computers were not able to support a really large external display. But it is NOT a defect. The spec was available long before you could purchase the computer.


The Apple standard for its built-in hardware-accelerated displays, makes them suitable for full-motion video for production/display of cinema-quality video with NO dropped frames, and NO dropouts or partial-blank scan lines due to memory under-runs or other issues. This requires a hardware rasterizer/display-generator for each fully-accelerated display. 

MacBook Pro 13" M1 2020 won't run 2 external monitors of the same config

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