Question Trouble daisy-chaining 2 x LG UltraFine 4k displays with a Macbook Pro M1 ?

ajitesh

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Jan 30, 2014
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I have 2 x LG Ultrafine 4k displays model: 24MD4KL (these ones) connected to my Macbook Pro M1 with a Thunderbolt 3 cable. They both work when they are both separately connected to the laptop but one does not work when it's daisy-chained to the other monitor. On the monitor's website it says they support Thunderbolt daisy chaining, and both monitors have 2 x Thunderbolt ports at the back, but I cannot get it to work for some reason.

When I play music I can switch audio output between the 2 monitors so it is definitely being detected but there is no display on the daisy-chained monitor.

I made sure I am using a Thunderbolt 3 cable and checked to see the speed (screenshot attached below) to make sure it is not a bandwidth problem.

Appreciate any help or troubleshooting tips, thanks :)

r/mac - System report screenshot showing the connected devices