SerialMagic is used to connect Sartorius micro-balance through Serial RS-232C to USB converter and a simple null-modem type RS-232C converter which I made myself. We use SerialMagic to directly put the weight data from the balance onto Excel running on Mac OS-X. It works well. I contacted Serialio technical support and within a couple hours got my question answered, even though it was at night. I was very impressed with Serialio’s punctuality and knowledge.