After a long time with this issue, my conclusions: (1) some of us are having this issue because of a board design issue, current demand from our USB device(iphone/ipad) is higher than mac USB can provide, as a result the port fails. (2) You will see this issue more frequantly when your device pulls more current - when it has low battery and tries to quick charge or when you use a high demand devices(ipad/Plus/Max) (3) when only the SUDO KILL command helps you have the 1 & 2 issues i wrote.