The updated and patched Sierra Mac Driver can be downloaded here. Thanks to for.

I recently upgraded my MacBook Pro to Mojave. Now I'm not able to connect to my Arduino board with ch340g usb-to-serial chip. It is a Arduino board with AtMega 328 and ESP8266 integrated. Where is boot camp driver for mac windows 10. I downloaded the drivers from the Chinese website for the ch340 and also removed old installations, like some tutorials tell me. I just can't get a /dev/cu.* port (besides the /dev/cu.Bluetooth-Incoming-Port.

I do have an external FTDI usb to serial board. I didn't get to it to try to connect it. Does someone know how to get the ch340 to work on MacOS Mojave, or as a last resort: use the FTDI to program/monitor the Arduino board?