Hi guys, I want to create this thread in order to help people like myself with their struggles to decide on an external 4k-display that's driven by a MacBook (early 2015). Since there are plenty of parameters (like HDMI vs. DisplayPort vs. USB-C, 30 Hz vs. 60 Hz, simultaneous charging of the laptop via USB-C etc.), I want to give an overview over the pro's and con's of each configuration, based on your input. I'm aware of some other threads in this forum (like this one) dealing with similar questions, however, I consider it a good idea to gather as much information as possible in a single thread. LG 27UD88, 3840x2160 confirmed via USB-C, 60 Hz confirmed, charging confirmed (=> @andy9l) Acer H277HK, 3840x2160 not confirmed, 60 Hz not confirmed, charging not confirmed HP ENVY 27, 3840x2160 confirmed via USB-C, 60 Hz confirmed, charging confirmed (=> @ahostmadsen) ... Looking forward to your input!