我使用的是 OSX 10.8.3，但我的手册页没有显示。我在使用 10.6 时也遇到过这个问题，但我不想修复它。
我找不到手册页的原因是它被设置为“/usr/local/texlive/2011/texmf/doc/man”。我想找出答案在哪里正在设置它（下面的清单显示正在通过 cat 命令设置它）。手册页存在于一堆目录中（如下所示），但由于路径仅设置为一个位置，因此 man 找不到它们。我的 shell 是 bash。
我查看了 /etc/profile ~/.bash_profile ~/.bash_login ~/.profile ~/.bashrc 和 ~/.MacOSX/environment.plist，没有看到任何与 manpath 相关的内容。
以下是一些相关信息：
macosx@sh ~ $ > manpath
/usr/local/texlive/2011/texmf/doc/man
macosx@sh ~ $ > man -v
man, version 1.6c
macosx@sh ~ $ > uname -a
Darwin sh.local 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64
macosx@sh ~ $ > man -d man
Reading config file /private/etc/man.conf
Looked whether there exists a message catalog man, but there is none
(and for English messages none is needed)
found man directory /usr/share/man
found man directory /usr/local/share/man
found man directory /usr/X11/man
found manpath map /bin --> /usr/share/man
found manpath map /sbin --> /usr/share/man
found manpath map /usr/bin --> /usr/share/man
found manpath map /usr/sbin --> /usr/share/man
found manpath map /usr/local/bin --> /usr/local/share/man
found manpath map /usr/local/sbin --> /usr/local/share/man
found manpath map /usr/X11/bin --> /usr/X11/man
found manpath map /usr/bin/X11 --> /usr/X11/man
found manpath map /usr/bin/mh --> /usr/share/man
using /usr/bin/less -is as pager
using /usr/bin/less -is as browser
using /bin/cat to dump HTML pages as textadding /usr/local/texlive/2011/texmf/doc/man to manpath
No manual entry for man
# wanted to ignore commented out lines
macosx@sh ~ $ >cat /private/etc/man.conf | grep -v ^\#
FHS
MANPATH /usr/share/man
MANPATH /usr/local/share/man
MANPATH /usr/X11/man
MANPATH_MAP /bin /usr/share/man
MANPATH_MAP /sbin /usr/share/man
MANPATH_MAP /usr/bin /usr/share/man
MANPATH_MAP /usr/sbin /usr/share/man
MANPATH_MAP /usr/local/bin /usr/local/share/man
MANPATH_MAP /usr/local/sbin /usr/local/share/man
MANPATH_MAP /usr/X11/bin /usr/X11/man
MANPATH_MAP /usr/bin/X11 /usr/X11/man
MANPATH_MAP /usr/bin/mh /usr/share/man
TROFF /usr/bin/groff -Tps -mandoc -c
NROFF /usr/bin/groff -Wall -mtty-char -Tascii -mandoc -c
JNROFF /usr/bin/groff -Tnippon -mandocj -c
EQN /usr/bin/eqn -Tps
NEQN /usr/bin/eqn -Tascii
JNEQN /usr/bin/eqn -Tnippon
TBL /usr/bin/tbl
REFER /usr/bin/refer
PIC /usr/bin/pic
VGRIND /usr/bin/vgrind
GRAP
PAGER /usr/bin/less -is
BROWSER /usr/bin/less -is
HTMLPAGER /bin/cat
CAT /bin/cat
CMP /usr/bin/cmp -s
COMPRESS /usr/bin/bzip2
COMPRESS_EXT .bz2
MANSECT 1:1p:8:2:3:3p:4:5:6:7:9:0p:tcl:n:l:p:o
.gz /usr/bin/gunzip -c
.bz2 /usr/bin/bzip2 -c -d
.z
.Z /usr/bin/zcat
.F
.Y
所以我找到了这个博客文章在 manpath 上，我看到的是：
macosx@sh ~ $ > cat /etc/profile
# System-wide .profile for sh(1)
if [ -x /usr/libexec/path_helper ]; then
eval `/usr/libexec/path_helper -s`
fi
if [ "${BASH-no}" != "no" ]; then
[ -r /etc/bashrc ] && . /etc/bashrc
fi
macosx@sh ~ $ > /usr/libexec/path_helper -s
PATH="/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/opt/local/bin:/opt/local/sbin:/usr/local/share/python:/Library/Frameworks/Python.framework/Versions/2.7/bin:/Users/macosx/.gem/bin:/Users/macosx/.gem/ruby/1.8/bin:/usr/local/texlive/2011/bin/universal-darwin:/usr/texbin:/usr/X11/bin:/Users/macosx/.rvm/bin"; export PATH;
MANPATH="/usr/share/man:/usr/local/share/man:/opt/X11/share/man:/usr/local/texlive/2011/texmf/doc/man"; export MANPATH;
因此，使用 path_helper 可以正确设置 manpath，但它在某处被覆盖。
为了澄清起见，我要求在哪里某些东西可能正在重置路径，我想通过正确重置 manpath 可以强制解决问题。我很想知道在哪里manpath 正在被改变。