Hello, I'm just wondering if there is any kind of converter or adapter (USB) to serial port (RS232). I heard about a vendor from Thailand that supports mac os. ( http://www.amazon.com/Male-RS232-Cable-Connector-Disk/dp/B00404N0IQ ) But the problem is I can't buy it from ebay or amazon. I just can't. So, there is any other adapter that you find normally across the globe?