Arduino Nano Ftdi Driver Mac

Show activity on this post. I just installed macOS Mojave 10.14 Beta and when i connect an Arduino to the USB port, nothing appears in my Arduino IDE ports list. If i try ls /dev/tty. i just see /dev/tty.Bluetooth-Incoming-Port connected. On macOS 10.13 everything was working ok.

Feb 20, 2016·3 min read

The guide is written with Mac OSX El Capitan, Arduino Nano V3 ( built by China ), Arduino IDE 1.6.5. Hope so it will be work with your situation.

The problem that I got is that the Arduino IDE in OSX El Capitan can’t upload the code to my Arduino Nano V3. In Arduino IDE, don’t have any port that is USB.

A little sad, but I try to check way to resolve this problem… Maybe it’s from the Driver of my OS that doesn’t support USB port of Arduino Nano.

My MacOS and Arduino IDE still work with Arduino Uno R3

When I checked the driver of Mac OS to work with Arduino Nano, I saw a link, you can download it from this. After download it, install it through CH34x_Install.pkg.

When installing was successful, open the terminal, run the command:

Then, restart the Mac. Check the files in /dev/ with start name “tty*”, if you see /dev/tty.wch ch341 USB=>RS232 1420, it is correct.

Now, try to open the Arduino IDE, you will see the port /dev/tty.wch ch341 USB=>RS232 1420 in list

But when you try to upload the code to the board from Arduino IDE, you will get the error:

avrdude: ser_open(): can’t open device “/dev/cu.wch”: No such file or directory
ioctl(“TIOCMGET”): Inappropriate ioctl for device
Problem uploading to board. See for suggestions.

The reason is the name of serial port that used in Arduino is not support the space, ya. So, we need a trick with Arduino IDE. We need to replace the text -P{serial.port} to “-P{serial.port}” in 2 files:

  • /Applications/
  • /Applications/

. We need replace all cases in 2 files.
. Assume your Arduino IDE install in path /Applications/

Close and try to upload with Arduino IDE again:

And we are done :) . So, hope it’s useful for you and leave me your comment if any.

Summarize steps:

Arduino nano ftdi driver macbook

1. Download the driver from url: link

2. Extract and install file CH34x_Install.pkg


3. Run the command: sudo nvram boot-args='kext-dev-mode=1'

4. Restart the Mac.

5. Replace the text -P{serial.port} to '-P{serial.port}' in 2 files:
+ /Applications/
+ /Applications/

So I bought some Arduino Nano ( over Amazon lately and was amazed that I got 5 boards for only ~15 EUR by some chinese retailer. When I finally found some time and wanted to start programming with the Nano modules I couldn’t manage to connect them to the Arduino IDE.

If connected via USB you normally have to make the USB connection first, start the Arduino IDE and finally have to select the model and mainly the port over the Tools menu. I did so on my OSX 10.11 ( El Capitan ), but the Nano module didn’t show up on the ports list. Only /dev/cu.Bluetooth-Incoming-Port was listed.

After some days of random Google researches and several driver installations without fixing the problem, I finally found out that there are two main USB to UART converter chips used which need different drivers.

Official boards use FT232 some chinese boards use a CH340 Chip

Arduino Nano Ftdi Driver Mac Free

First have a look at the USB modules on your board and read if it says something like „CH34*“ or „FT232“. You could with the chip on the backside of the Arduino board like this:

First of all be sure that your board is still working and is detected at the USB Port. So go by „Apple Logo top left“ > „About This Mac“ > „System Report“ > „Hardware / USB„. Try this once without the Arduino board connected and once with the board connected. There should be an additional USB device listed. With the original Arduino boards you might directly get the board name, like „Arduino Leonard“. With the cheaper models it maybe just say „USB Device 2.0“.

For the official Arduino boards with the FT232 chips you need the FTDI Driver. Those drivers are officially signed by Apple too. No further problems to be expected. Do the following steps:

  • Download the drivers ( Version 2.3 and later ) from here:
  • Install the downloaded .pkg file
  • restart the computer
  • You should find a new port listed within the Arduino IDE, like /dev/tty.usbserial-xxxxxxxx

For other boards using the CH34x chip you need those drivers. The problem here is, that they are currently not signed by Apple ( and probably will never ). So we have to switch of the security mode. This is of course officially not recommended. WARNING: This will not work with OSX 10.12 (macOS / OSX Sierra). For macOS 10.12 or later you could use the following solution. Please do not do this with those versions as this will stop the boot process and you have to unset this via recovery mode.

For OSX 10.9 – 10.11. you could do the following steps:

Arduino Nano Ftdi Driver Mac Os

  • Download the drivers from here:
  • Install the downloaded .pkg file
  • restart the computer
  • run the following command within the terminal sudo nvram boot-args='kext-dev-mode=1'
  • after confirming this with your admin password, restart the computer
  • You should find a new port listed within the Arduino IDE, like /dev/cu.wchusbserial1d10

If you want to remove those drivers later remove all file like „FTDIUSBSerialDriver.kext“ or „usbserial.kext“ from the /Library/Extensions directory.