open terminal
$sudo rm -rf /System/Library/Extensions/usb.kext$sudo rm -rf /Library/Extensions/usbserial.kext
Solution 1 :
in terminal:
$brew tap mengbo/ch340g-ch34g-ch34x-mac-os-x-driver https://github.com/mengbo/ch340g-ch34g-ch34x-mac-os-x-driver$brew cask install wch-ch34x-usb-serial-driver$sudo reboot
Solution 2 : (Recommend)
download & install & reboot
