Use with original Apple MacBook 12" which only had a USB-C port. Therefore, to use an external monitor, through power is required. And it works. I have a 32" 4K monitor from a 12" Macbook. The poor MacBook doesn't have enough power to drive that many pixels, but it works. On Mac, you can play with the text size to make it readable. I can even use clamshell mode (when the Mac stays on with the lid closed while using an external monitor). I'm not sure how safe this is for a poor 12" Macbook (with passive cooling and no internal fans), but I'm here to confirm that it works. The pass-through port isn't that important, but it still takes an adapter to connect an HDMI monitor (even though I don't use the pass-through port), so I hope it lasts.
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