Never in a million years would I have imagined myself a Mac user. But Mac OS X has changed all that, and it's now my primary desktop. For a long-time Unix/FreeBSD/Linux user it has everything I want: a mature and stable Unix operating system and the open source software I could not do without (security tools; mail routers, servers, tools, and agents; languages; web platforms; directory), with a beautiful graphical environment, multimedia viewers, and productivity software that are to be had only with great difficulty on Linux, if at all. And then there are the stunning extra goodies.