With different devices, it works on Mac OSX (and probably linux)

[drf5n]

Try this bit of code in cardReader.py:

    ...
    c = ['/dev/tty.usbserial']
    for x in range(0, 255):
        c.append('COM' + str(x))
    for x in c:
        try:
            self.__serialConn = serial.Serial(x)  # opens the serial port
            print("Worked: "+x)
    ...

And you can easily add other likely devices in the c=[...] list.

[manwinder123]

Hey @drf5n,

I am unable to try the code as I sold the MSR605 I had 😵.

I'll leave this issue up for visibility and not close it.