M1 Mac Mini with 2 LG UltraFine Monitors (Victory is Mine, but I Need Advice)

Software
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1

I’ve just purchased an M1 Mac Mini (so shiny, so fast) and prior to it arriving I did a ton of research about how to get my two USB C/Thunderbolt 3 LG Ultrafines to work with it.

I’m aware of Mike Schmitz’s solution, but I’m based in the UK and the shipping and taxes for the dongle he found adds about $120 to the price of the $45 dongle!

I’ve found that a HDMI —> Displayport Dongle along with a bi-directional USB C —> Displayport cable enables me to run both LG UltraFines. However (annoyingly) I can’t adjust the brightness of the second monitor (the one connected via HDMI/Displayport).

Does anyone know of a good display app that would enable me to do that? (I have the LG Screen Manager app and it’s no help).

2

Does the display brightness work when you switch to the Displayport rather than the HDMI?

Probably so.

In this case, the specs on the USB->HDMI->Displayport adaptor are likely below the standards needed for the second monitor to recognize that brightness can also be presented to you as a control parameter. I know that my LG UL 4k has a limited set of options when I drive it with HDMI through a poorer quality adaptor.

AFAIK, Displayport is supposed to allow daisy chaining without the need for intermediate adaptors.

–
JJW

3

It seems the new OS update killed by work around. Now the Displayport monitor will only go to one of three resolutions–all of which are essentially useable.