Arduino Nano serial port not recognized on Mac 10.12

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. All I could select was “dev/cu.Bluetooth-Incoming-Port”.

I never had to install special drivers for Arduino on Mac before (but do on a PC) but I did some searching and decided to try the FTDI drivers (most recent release from 2015). No luck.

I then decided to try my UNO. I couldn’t find it, and had to open a brand new one up. It was also not recognized.

After some searching, I found out that many clone Arduino are using a different USB-to-Serial chip, and need special drivers. The “official” ones (from a Chinese website!) cause a kernel panic due to a bug in the current release.

I found this:

https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver

These drivers work and I now can use this clone Arduino Nano:

Arduino Nano visible using replacement CH serial drivers.

I hope this helps someone else not waste an hour like I had to tonight to find this ;-)

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