diff --git a/.zshrc b/.zshrc
index dac2045..f5fdb39 100644
--- a/.zshrc
+++ b/.zshrc
@@ -231,5 +231,6 @@ esac
 ## load user .zshrc configuration file
 #
 [ -f ${HOME}/.zshrc.mine ] && source ${HOME}/.zshrc.mine
+[ -f ${HOME}/.zshrc.mac ] && source ${HOME}/.zshrc.mac
 [ -f ${HOME}/.zshrc.alias ] && source ${HOME}/.zshrc.alias
 
diff --git a/.zshrc.mac b/.zshrc.mac
new file mode 100644
index 0000000..2dd347b
--- /dev/null
+++ b/.zshrc.mac
@@ -0,0 +1,4 @@
+export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home
+export EDITOR=/Applications/MacVim.app/Contents/MacOS/Vim
+
+alias ls="ls -G --color"
diff --git a/.zshrc.mine b/.zshrc.mine
index 33ddfa0..c1a9661 100644
--- a/.zshrc.mine
+++ b/.zshrc.mine
@@ -1,7 +1,2 @@
 [[ -s "/Users/kazuki/.rvm/scripts/rvm" ]] && source "/Users/kazuki/.rvm/scripts/rvm"  # This loads RVM into a shell session.
 
-export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home
-export EDITOR=/Applications/MacVim.app/Contents/MacOS/Vim
-
-alias ls="ls -G --color"
-alias tmux="tmuxx"
diff --git a/setup.sh b/setup.sh
index f8509ca..84d0545 100755
--- a/setup.sh
+++ b/setup.sh
@@ -7,3 +7,8 @@ do
     ln -s $HOME/dotfiles/$file $HOME/$file
 done
 
+case "${OSTYPE}" in
+freebsd*|darwin*)
+  ln -s $HOME/dotfiles/.zshrc.mac $HOME/.zshrc.mac
+  ;;
+esac