I am thinking about migrating a Windows driver into OS X. Now I am just starting to look around to see what is available and there is a lot about objective C and cocoa. Seems th
The Apple Hardware & Drivers page has lots of information about Mac driver development. It should be enough to get you started. Some of the highlights:
Getting Started - A guided learning path for hardware and driver developers new to Mac OS X.
Frameworks - API references organized by framework.
USB Sample Code - Resources for developing USB devices and software to access them.
FireWire Sample Code - Resources for developing FireWire devices and software to access them.