I am experiencing the same issue on OS X 10.11.5 (MacBook Pro (Retina, 15-inch, Mid 2014)), using a Wemos D1 Mini and an Amazon USB Cable. I've just got my NODEMCU ESP-12e with CP2102 (1.0), I'm using a MAC AIR, but the device doesn't appear on the PORT list, as some of the guys above. THEN reinstalled the silabs driver but using the. Running the Firmware Uploader tool. Download the firmware file and uploader from above links and open the dmg contents. Before connecting the RF Explorer device to your Mac computer, make sure the baudrate in the device is set to 500kbps in the RF Explorer internal CONFIG MENU.

I have a MacBook Pro running OS X Yosemite (10.10.3). I connected my Arduino UNO R3 to my computer for the first time after the Yosemite upgrade - it worked fine before this! When I opened the Arduino IDE I selected Tools > Board > 'Arduino UNO', but when I try to choose a Serial Port the only options are: /dev/tty.Bluetooth-Incoming-Port /dev/cu.Bluetooth-Incoming-Port /dev/tty.Bluetooth-Modem /dev/cu.Bluetooth-Modem I have followed several tutorials and threads on how to 'fix' this issue, all to no avail: I've installed the latest version of the FTDI drivers (even though, from what I recall the UNO doesn't even need them): FTDIUSBSerialDriver_v2_3.dmg Downgraded to a prev. Version of the FTDI driver hoping that would clear it up: /Volumes/FTDIUSBSerialDriver_v2_2_18 I followed a tutorial of how to remove the existing Apple drivers and removed the kext files, etc. Tried connecting arduino to both USB ports.

Tried various cables, including the one that a I used before the Yosemite upgrade. Tried installing updated Silabs drivers: Walked through the entire Arduino Mac OSX guide: After looking into the system info of my Macbook Pro, I can see the USB Controller is Broadcom based, in case that helps. I searched for Broadcom USB drivers but got hits for Silabs one instead. Under my Tools > Port menu.

I can see these options: clicking the Serial Ports option doesn't do anything. Running ls -1 /dev/tty.* or ls -l /dev/tty.usb* from terminal gives me: /dev/tty.Bluetooth-Incoming-Port /dev/tty.Bluetooth-Modem The Board does NOT show up under system networking (as it has for others), so it's not recognized as an incorrect device. I'm at a complete loss. The board powers up.

But I cannot connect to it. SIDE NOTE: This is a legit Uno R3, not a clone. If it is a legitimate Uno, then all of the FTDI and SiLabs efforts are an irrelevant distraction at best. Ideally, test the board and cable on an another machine to make sure it has not been damaged in the meantime, and try a different USB port on the Mac (especially try connecting through a keyboard or hub if you tried directly, or directly if you had tried a hub).

I believe if you look in system information you can get a listing of all USB devices, which would be good to include in your post. – May 25 '15 at 19:54 •. Probably, you have Chinese Uno analog which works on CH340 USB-to-serial chip, so you need to install driver for it. Steps to fix: • Install the • Run the command in Terminal: sudo nvram boot-args='kext-dev-mode=1' (disable kext signing introduced in Mac OS X 10.9 Yosemite) • Reboot Also you're right: Differences with other boards The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega16U2 (Atmega8U2 up to version R2) programmed as a USB-to-serial converter. Yosemite 10.9 (and OS X 10.10 and newer) requires a signed USB driver kext (kernel extension).

You can find one on the FTDI web site here: Use version 2.3 for 64-bit OS X 10.9 or later. Install and reboot. Plug in your Arduino, and the Terminal command: /usr/sbin/kextstat grep FTDI will tell you if the FTDI VCP driver actually loaded.