Is there an update for the new MAC OS (Sierra 10.12),
I'm using an UNO and had no problem running things on the previous OS.
Cannot communicate with the UNO since I updated to OS-10.12.
I get the [stk500_recv(): Programmer is not responding] when I attempt to upload a sketch to the UNO as well as the Serial Monitor not receiving data from the UNO.
Any suggestions / help / updated drivers?
I have the same problem,
Macbook pro retina 15" mid 2011
I tried installing different drivers.
I only see the bluetooth port.
Which version of the Arduino IDE are you(both of you) using?
I downloaded the latest update that was done on Oct 4
What communication chip is on board?
Do you have a clone or an original Arduino Uno.
If clone, then check what USB/serial chip is on board. (FTDI, CH340 ..)
I have an original Arduino UNO R3
I have been using this iMac for a few weeks now. The OS was the latest version of El-Capitain.
Everything worked fine.
Now that I've updated the OS to Sierra....UNO not communicating with mac.
I may have found the problem.
For some unknown reason, after updating the OS to Sierra, the port was changed to:
I had no other options to change this.
I completely disconnected every cable/wire from the UNO and restarted the Arduino IDE. I was then given a different option for the Port:
/dev/cu.usbmodemFD141 (Arduino/Genuino Uno)
Now everything seems to be populating to the Serial Monitor Tool.
I also am now able to upload sketches to the UNO.
Thanks to all for the help.