Any 3rd external monitor not working

I have 3 external monitors plugged in to my MacBook Pro 13", but whatever monitor that is plugged in first and second work, the third monitor (in whatever order they're plugged in) does NOT. It does not detect. All three monitors are connected via USB-C/HDMI Adapter. Doesn't seem to be a monitor, or cable issue. Wondering if this is a hard limit on the OS?

MacBook Pro 13", macOS 10.14

Posted on Nov 4, 2019 5:57 AM

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Question marked as Top-ranking reply

Posted on Nov 4, 2019 8:47 AM

The following has been the case for the Macbook Pro models for many years (2 external monitors)

*In addition to simultaneous support of the internal
display, this model supports a single external display up to 5120x2880
at 60Hz at over a billion color, up to two displays up to 4096x2304 at
60Hz at millions of colors, or up to two displays up to 3840x2160 at
60Hz at over a billion colors via Thunderbolt 3 (USB-C).


There are some people that have managed to use a USB to video adapter and drivers in order to get more monitors. But sometimes the drivers break when Apple does an operating system upgrade. Your Mileage will vary.

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Question marked as Top-ranking reply

Nov 4, 2019 8:47 AM in response to monkfu

The following has been the case for the Macbook Pro models for many years (2 external monitors)

*In addition to simultaneous support of the internal
display, this model supports a single external display up to 5120x2880
at 60Hz at over a billion color, up to two displays up to 4096x2304 at
60Hz at millions of colors, or up to two displays up to 3840x2160 at
60Hz at over a billion colors via Thunderbolt 3 (USB-C).


There are some people that have managed to use a USB to video adapter and drivers in order to get more monitors. But sometimes the drivers break when Apple does an operating system upgrade. Your Mileage will vary.

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Any 3rd external monitor not working

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