The book Mac OS X Internals describes the architecture and design of Apple's operating system. The book is targeted at anybody who is curious about Mac OS X and has a system-level interest in operating systems. At a very high (and simplistic) level, the book appeals to both those who use Mac OS X, and also those who do not. The book's author Amit Singh, Manager of Macintosh Engineering for Google, joins Phil and Scott in a discussion of both his book and MacFUSE, a Mac version of the FUSE specification.

They first talk about Amit's background, particularly how he came to write his book. This book is an ambitious attempt to cover the modern operating system of Mac OS X in substantial breadth and depth in one volume. They review how OS X evolved from earlier Apple operating systems, as well as misconceptions about OS X, as well as an assessment of where both Apple and other operating systems are likely to go from here. The second part of the talk is a review of the status of MacFUSE, a Mac version of the FUSE specification for creating file systems in user space instead of in the kernel.