Steps to fix: Install the CH340 driver Run An extra serial port can be used on an Arduino Uno, but must be simulated in software by using the SoftwareSerial library. Mac OSX Yosemite no serial ports showing for Uno R3, Probably, you have Chinese Uno analog which works on CH340 USB-to-serial chip, so you need to install driver for it. ![]() IIRC there was some big mess about mac driver compatibility for CH340G, but that was solved many months ago and working drivers are available. I use the mac Probably a CH340G or CP2102 - look for a chip with those markings near the USB port, then google your operating system version, that part number, and the word drivers. Arduino NANO is genuine, no chinese copy - MacBook Pro with Touchbar, USB-C ports. Mac, serial ports not detected, 3), no serial ports show on my mac. ![]() Changed out 4 different USB Arduino Nano serial port not recognized on Mac 10.12 4 Replies John Strong of StrongWare sent me an Arduino Nano to experiment with, and I was puzzled when it would not appear as a Port in the Arduino IDE. Sad I, Never had a "Network detected" dialog when plugging in Arduino Uno on Snow Leopard 10.6.8 on MacBook Pro.
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