I have updated my MAC from El Capitan to Sierra. I had Apple signed FTDI drivers (El Capitan needed this) so was not expecting any problem. However now my MAC does not find the USB port in the Arduino IDE so I can no longer program anything! If I do a MAC system report the FTDI device is listed under hardware->USB BUT if I do "ls /dev" in terminal the devices are not listed like they used to be in El Capitan.
I am using the latest Arduino IDE, 1.6.12 which since it says has Sierra support. Am I the only one to find that Sierra does not work?
(I have also found that using a CH34X based USB device crashes Sierra - but that is another known problem).
Thanks for any help.