Title: I/O Kit Drivers for L4 Author: Geoffrey Lee School of Computer Science and Engineering, The University of New South Wales, Sydney 2052, Australia, glee@cse.unsw.edu.au Abstract: The I/O Kit is the device driver framework for Apple's Darwin operating system. The Mach kernel has performance problems and the Darwin system could potentially benefit from a faster kernel such as L4. For an L4-based Darwin system to gain widespread adoption, I/O Kit driver support is crucial. This thesis investigates into the feasibility of having I/O Kit drivers on L4 and discusses the implementation issues relating to it, and future research and engineering opportunities as a result of this work.