[thrkw123456789]

Because osx in not linux? (Although it does bundle some out of date gnu tools.) A separate osx section would seem more appropriate.

[acangiano]

Poor phrasing on my part. What I meant is to have an OS section and then discuss Linux and OS X as the two main options or mention OS X as an alternative, if Linux is the OS he intends to promote in the section. He could also mention non-Darwin BSD.