Probably a subject beaten to death but: Ars Technica has reviewed this machine and using a third-party dongle managed to get the new Macbook to drive a 4k display at 30Hz through MST mode. Apple's own support page states that you can get 4k @30Hz through HDMI using their own USB-C Digital AV adapter, but you can also get 60Hz via SST. What can the machine actually do? I'm fine with just one port and slightly lower performance but I would like to hook it up to a 4k display when I'm at home so I can use it as a desktop. Any information? The available info out there seems really inconsistent and it'd be great to get some real world confirmation.