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Comment by jari_mustonen | Hacker News Reader

M1 mac, two thunderbolt 3 monitors (daisy chained or on separate ports), only one working.

As crooked-v noted, there is no native support within the M1 Macbooks for multiple external displays. Apple states this on the tech specs page in the Video Support section: https://www.apple.com/macbook-pro-13/specs/

You can workaround the issue with a Displaylink dock though. I've been using the Dell D6000 dock to run two displays on my M1 Macbook Pro since launch. It's definitely not a perfect solution (with buggy wake-from-sleep quite often) but it's a good compromise until there's native support.

That's a hardware limitation of the current M1 chipset, not a software bug.

Apple has stated that they will provide software fix for this eventually but have not done so so far. Instead we are getting these new releases with all kinds of fancy UI upgrades and what nots. Also, my bluetooth requires reboots almost on daily basis.

> Apple has stated that they will provide software fix for this eventually

I would be really curious to see the source for this.

Perhaps the PR person didn’t talk to the hardware people first to see if it was actually possible. I doubt it’s ever going to happen. You should be looking to get the M2 and not wait for a fix that will never come.

Which M1 Mac? Because isn't the only M1 Mac that is actually capable of running two external displays on a hardware-level the Mac Mini?

No M1 machines support two Thunderbolt displays. The mini supports another HDMI display, and the rest can work with USB adaptors.

There's no difference between external and internal display. The M1 can drive 2 displays. Your Macbook already has 1

Not true. I can’t use it with two external displays with lid closed.

I imagine it's more like there's only two lanes for graphics and the one lane is permanently taken by the internal display.

If you really want to, you can probably resolder and add an hdmi connector

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