A correct cable should be supplied, at least that was the case for me. But be careful: the supplied cable has a USB-C connection on one side and a USB-C connection with a USB-A adapter on the other side, which must be removed. Then it works. It is possible that the cable provided by Digitec is not compatible with DP-Alt mode, which is necessary for image transmission with USB-C.
I have used this monitor twice myself, but mostly I use a Lenovo notebook with it. However, I have also connected it to a MAC before and it worked. So please check the following:
- Was there really no cable included? Not even the USB-C with adapter I described? (the cable at the bottom left of this picture:
https://www.prad.de/wp-content...).
- Is the monitor set to the correct input?
- Is the external monitor active and set on the laptops? On the Lenovo you can certainly switch the profiles with Windows+P and make sure that "PC screen Only" is not active here (don't know where this is on the Mac, but certainly similar).