Unable to connect Dell 27 UHD USB C Monitor to a new Mac mini

TokaiTom wrote:

Dell 27 4K USB-C Monitor - S2722QC - 68.5cm (27")

OK. So 3840 x 2160 pixel resolution at 60 Hz, with a USB-C input and two HDMI inputs.

Dell claims that the monitor supports "1.07 billion colours" (i.e., 10-bit-per-channel color). If you connected using HDMI and the HDMI port at either end of the cable was a v2.0 one, you might be forced to choose between 60 Hz (with 8-bit-per-channel color) and 30 Hz (with 10-bit-per-channel color).

I'd expect either of the following to work:

• A USB-C to USB-C connection from one of the rear-panel USB-C / Thunderbolt ports on your Mac mini, to the USB-C port upstream port on the monitor (port #4 in the illustration). (The front-panel ports on the Mini carry USB only, and will not provide a video signal.).
• A HDMI to HDMI connection from the Mac mini to the display. This would not connect downstream USB ports.

If you're not getting a signal, check that the monitor is looking for the signal on the input port to which you hooked up a cable. You might need to use the menu controls on the monitor to do that.

TokaiTom wrote:

Thanks for your help

...therein lies the problem.... I can't access the menu at all.... just the input source selection! ...I can't do a factory reset because I can't access the menu!!

:-)

I don't recall mentioning a factory reset – but as far as operating the monitor menu controls, have you reviewed the instructions in the Dell S2722QC Monitor User's Guide ?

Two options:

• Connect HDMI-HDMI using a cable not longer than 3'. After you have it working, connect the Mini to Monitor's upstream port using a C cable not longer than 1m. Refer to the monitor manual to locate it - be sure it's the right port. You will then need to go to the mini's Display settings to choose HDMI over C for display functions

OR

• Connect Mini to Monitor's upstream port using a C cable not longer than 1m. Refer to the monitor manual to locate it - be sure it's the right port. You can use the supplied cable, but to be honest, it screams Texas all over - very beefy. I would get one from Apple.

I recommend HDMI.

More details please, on your Mac, the Dell model, cable, port etc.

Cable used with length and ports it’s connected to? :-)

You’re welcome but be aware, Dell support is fos. You probably got a bot response. All their monitors work with macOS - so feel to continue.

Neither is mine - ignore, that link is also fos. Please provide the exact model name (and while you're at it, you can discard that amazingly thick cable Dell included, not needed).

You're welcome.

Which Dell monitor? Is this the Dell 27 4K UHD USB-C Monitor - S2722QC, the Dell UltraSharp 27 4K USB-C Hub Monitor - U2723QE, or something else?