I have checked that NO driver for MAC os 10.12 on tp-llink official website, only up to OS10.11 for this adapter now

refer to this link: http://forum.tp-link.com/showthread.php?101094-Security-Flaws-Severe-flaws-called-quot-KRACK-quot-are-discovered-in-the-WPA2-protocol

How about the connection on other smart phones? What's the firmware version and hardware on your repeater? Does the repeater has the same SSID with your main router or they have different SSID? You...

I think the splitter TL-PoE10Rwill work, as it can provide the power the deco need. http://www.tp-link.com/en/faq-167.html As far as I know, there is no splitter with USB Type C cable

what's the model.no of your router? What kind of VPN you connect it to ?

Hi Luowilliam, There is no way to downgrade the firmware once it has updated to the US version, for the wifi unstable issue , have you tried to change channel and channel width? How about the wired...