I am using this as a video cable for the LG Electronics 42.5" 4K LED Backlit Monitor (43UD79-B) for my MacBook Pro with Touch Bar. Works very well. Note. If you want to power the Apple 5K model, you don't need a USB-C cable (although they share the same connector). There seems to be 3 types: charging, data and Thunderbolt3 video. This is a type of data, It should also work with external hard drives. By the way, do not try to look for longer cables, the USB-C standard limits them to 1m. The charging type can be longer, but it will not be good for Be data or video If you need a longer video, you'll need to buy something like an HDMI converter.