Opening /dev/cu.usbserial-A50285BI @ 10400 baud (settle 2.0s)...
could not open /dev/cu.usbserial-A50285BI: [Errno 2] could not open port /dev/cu.usbserial-A50285BI: [Errno 2] No such file or directory: '/dev/cu.usbserial-A50285BI'