2017 MacBook Pro can't connect to Dell P2715Q via USB-C to DisplayPort cable

I purchased a USB-C to DisplayPort cable from Amazon to connect my 2017 MacBook Pro to a Dell 2715Q however it does not seem to be working.

From what I've read and from some of the cable reviews, there shouldn't be an issue yet my MacBook does not recognize the display. The monitor seems to know that it is connected to a device and shows a message saying that there is no signal coming from the computer.

Is it possible that there is some setup I need to do, or is there a compatibility issue between the display and cable? Or is it possible the cable is no good? Any help would be greatly appreciated!

Solution 1:

I used the Star Tech USB to DisplayPort Cable to a similar model monitor, and it worked.

On 1 monitor I had to manually change the DP version.

Solution 2:

On my old monitor Dell U3014, I needed to go to the settings of the monitor (not the laptop) and turn on the DisplayPort 1.2 support which is for some reason disabled by default. To make things worse, the local menu (and not just the input source) on this monitor becomes available only after some valid signal is already coming. Connect some other video source temporarily to it.

My mac is MacBook Pro (15-inch, 2017), OS 10.13.3 (17D102), cable Delock 85256 USB C. The display is Dell U3014, it worked fine with various computers for many years and still does.

HDMI to USB C adapter works with this monitor out of box but for some reason produces really low quality image (something wrong with colours).

Summarising, DisplayPort 1.2 must be supported by the cable and monitor, and also activated on the monitor side.