How to connect MacBook Pro (2020) to ultra widescreen monitor?

I have an ultrawide monitor that's 3840 X 1200. It works perfectly fine with my windows laptop.

I now need to connect my work MacBook Pro provided to me, but under the list of resolutions (and extended hidden resolutions) none of them come close.

Is it a matter of the cable I'm using? I'm using a HDMI cable with a usb-c adaptor on the end to connect it to the MacBook.

Solution 1:

Besides the other answer, you might have better results with a DisplayPort cable if your monitor supports it. My 3440x1440 monitor for instance works at 100hz with DisplayPort and only 60hz with HDMI.

Solution 2:

Yes, the cable is very important. Some HDMI cables do not support a 4k display signal at all, and some only at a lower refresh rate of 30 Hz. You definitely want a version 2.0 or higher HDMI cable capable of support 4k at 60 Hz.