Mac OS X in a Nutshell
The Gist The book is quite well structured, and organized into into 5 parts. The first is a quick overview of the Macintosh GUI. The second part, "System Configuration," is mainly devoted to getting the system running well (covering preferences, networking, the file system and Java). The third section, "System and Network Administration," is a good guide to several lower-level tasks, including an excellent chapter on directory services and NetInfo. The fourth is about development, including Apple's IDE "Project Builder" and CVS. The final part covers the Unix underpinnings of OS X and X Windows. This includes a Unix command reference of over 200 pages.
The Good The book is also well written, with light, easily understood prose and some good screen dumps, tables and diagrams to make some of the more complex points easily understood. I appreciate the detailed contents section, good quality index and black chapter tabs at the side of each page for finding the information I need.
Everything seems to be covered, though you may sometimes find yourself needing to go elsewhere for more depth, but this is really only to expected in a book that is trying more for breadth across an entire operating system than depth in one particular area.
Despite having used and developed on a Mac for over 15 years and OS X since the late beta stage I still found myself discovering something new and useful every few pages in the book.
The Bad The section of the book I appreciated least was the Unix Command Reference. 200 pages, most of which are adequately covered by the online man pages or a quick 'command --help'. Not that it isn't useful having this information on paper, and not that this section isn't more complete than the man pages and less error-ridden. It's just that my favourite operating system has a large number of commands that are hard to find by name alone. Online, I tend to rely on apropos to find what I need. Back when you paid a large amount of money for a Unix license they came with hard copy manuals that included a permuted word index of the same top slug that apropos searches, which made them infinitely more useful. O'Reilly could improve the heck out of this book by giving us the same thing for what I felt was otherwise an almost totally wasted 200 pages (though I admit that the combination of the chapter on NetInfo and the command references for nicl and niutil etc. actually have me now understanding and using NetInfo well.)
Once again O'Reilly have provided a web page for the book that is mostly marketing material -- though in this case the Errata page is useful. At the bottom of the page they have a number of links to "Related O'Reilly Articles" but have only listed three by the authors of the book, leaving out, for example, X11 and Open Office on Mac OS X by Wei-Meng Lee and Configuring sendmail On Jaguar by James Duncan Davidson to name two MacDevCenter articles I've found incredibly helpful.
Conclusion
This book is not quite in the "must buy" category. If you do want a book to help you with the more technical aspects of OS X or to help you move to OS X from Unix or Windows hacking then this one is worth a serious look. It certainly better covers the technical aspects than OS X Bible and others of that style (such as the Missing Manual or Robin Williams' Little Mac OS X Book.) The only other volume that really compares is OS X Unleashed and it has way too much coverage of the simple stuff and the various applications, is not as well structured and has a wordier, less terse and technical style. It's also more expensive and twice the size and weight.
You can purchase Mac OS X in a Nutshell from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.
But Macs are shaped nothing like nutshells.... although, it might be cool if they were!
i always thought that os x's preemptive multitasking, buffered memory and journaled filesystem were pretty gay myself. the SMP thing sounds a little willy-nilly to me too, two processors working together, doing everything in unison...pretty gay you are right.