Ok people, there has been TWO instances of people using third party
instructions in the past hour(s). One in IRC and one on this ML.
Apparently when googling for "gentoo prefix osx" the first link is
some lugons.net site. DO NOT USE THAT. It is third party and we cannot
support it.

You can find all official docs here:
http://www.gentoo.org/proj/en/gentoo-alt/prefix/ (the HOMEPAGE)

One of the links on our homepage is
http://www.gentoo.org/proj/en/gentoo-alt/prefix/bootstrap.xml - this
should be EVERYONE's first stop. Bug reports filed with other
instruction sets will simply be closed as invalid, like this:
https://bugs.gentoo.org/434142

Thanks for understanding,
-Jeremy