"Let's start right off by tackling the most pertinent question
for this article: why the heck would someone want to run Linux on a
Mac system that already has a very nice Linux distro hidden beneath
Mac OS X? Built atop NetBSD, there's quite a bit of Linux sitting
there waiting to be utilized in the system, including niceties like
crontab, robust account management and much more.
"Go to Applications→Utilities, and you'll even find X11, a
tightly integrated version of the popular Linux windowing system
that plays nicely with the graphical interface that defines the
so-called Mac experience. What more could a geek want?
"The best answer is simply to quote Sir Edmund Hillary, or
perhaps misquote him slightly. Why run Linux on a Mac? "Because you
can." If it just feels too wacked to you, take a deep breath and
proceed to the next article in the magazine—no harm
done."