[Tepix]

To be fair, I'm facing the same issue with a Dell XPS 13 9350 i bought instead of the new MacBook Pro:

I want to connect it to a 4k monitor at 60Hz via DP or HDMI 2.0. You have to find out how DisplayPort is done on the TB3 port (with USB-C plug) to know which adapter will work. The safest way seems to be to read Amazon reviews.

Thanks Amazon reviewers!

[lcbiazon]

I have the same problem, but since I don't have Amazon here I'm testing different cheap adapters from aliexpress. No luck so far.