Dear Team, I am familiar with USB technology and driver development in Windows and Linux and I am new to MAC at development level. I used MAC only at user level. The goal is to develop USB Bulk driver on MAC. Since it is not generic class like Mass Storage, Hid, etc. there is no native driver for bulk class in the MAC OS. After doing some homework, I realized the following couple of points. 1. Study about I/O Kit Fundamentals and then start developing the driver. Experts, please kindly guide me in the correct direction if I am deviating from the exact requirement. Regards.