Second Monitor Mac Mini 2020 M1

plug 1 monitor into the USB-C port...that will be your main monitor. Adapt the HDMI port into USB-C and connect your second monitor that way. It should work.

I have 2 HDMI monitors with an M1 Mac Mini. I have found that there is an issue with using the same connection type

(HDMI-HDMI) because i think apple assumes your main monitor will be plugged into Thunderbolt directly and a secondary will be plugged into HDMI directly. Once you have to adapt any ports, issues start to pop up. I have to change my Window Arrangement in Display settings when the computer wakes from sleep or when turned on from a Shut Down.

That is interesting to hear Justin. I have a Mac mini 2018 and it allows me to connect two 4K monitors via usb-c and it looked like the M1 version would force me to use HDMI for one monitor and your experience confirms this. I was surprised that the new M1 had only two usb-c ports instead of the four on the intel versions, I use two for monitors and one for another peripheral, and this put me off upgrading.

Why are you surprised, the M1 only has 1 TB3 controller. You cannot connect two 4K displays via USB-C but you can connect 2 4K monitors, I have 2 LG 3640x1600 displays connected to a MacMini M1 and they work fine. 1 is connected via USB-C, the other via HDMI. Zero issues

You can connect 3 to the M1 version, go Google it, you can't have 4 Thunderbolt ports with 1 controller, the intel version has 2 controllers. The M1 blows the Intel version out of the water performance wise.

I have one LG ultrafine, and an old iMac that I wanted to use as a second display.

I have been unable to find a solution that works with the M1 Mac mini.

the delock hdmi to mini DP adapter that I bought just gives me a black screen on the iMac, and while the Apple usb-c to DP adapter that I just bought does work, I sadly just now found out that it’s impossible to connect both monitors at the same time :-(

does anybody know a hdmi to mini DP adapter that actually works with an M1 Mac mini and an iMac?

You should be able to connect a Mini DisplayPort device to the M1 Mac mini HDMI port using this HDMI to DisplayPort converter

http://www.foinnex.com/pd.jsp?id=309#_pp=175_3141

and a DisplayPort to Mini DisplayPort adapter.

https://www.cablematters.com/pc-707-153-displayport-to-mini-displayport-male-to-female-adapter-6-inches.aspx

The Foinnex converter has a USB cable to provide power to the converter in case the Mac mini does not provide enough power via HDMI.

Make sure you have updated to macOS 11.1

The Apple USB-C To Digital AV Multiport Adapter is for connecting a HDMI display to USB-C. It will not work in the other direction.

Yes it can, I run two 3840x1600 screens at 75hz without issue.

It’s disappointing that they have reduced the number of ports. You can connect 3 monitors to the Intel version and I was thinking of adding a third.

The Apple tech specs say the M1 supports up to 2 displays so are they wrong?