Had to resort to the FTDI supplied driver on OSX because the OSX bundled FTDI driver caused the entire usb subsystem to die. I reproduced the issue by connecti

Had to resort to the FTDI supplied driver on OSX because the OSX bundled FTDI driver caused the entire usb subsystem to die. I reproduced the issue by connecting two FTDI serial ports, opened each /dev/cu.usbserial* device node with a screen session, and piped War and Peace.txt through at 115200 baud. Closing the screen session on the read end would cause ALL usb devices connected to the Mac to cease functioning.