my Mac ~/.bash_profile

# export LSCOLORS=gxfxbEaEBxxEhEhBaDaCaD
PS1="\$(date +%H:%M) \[\033[1;32m\]\u@\[\033[0m\h\[\033[0m\]\[\033[1;36m\]:\w\[\033[0m\]$"
LSCOLORS="DxGxFxdxCxegedabagacad"
export PS1 LSCOLORS
alias ls="ls -GF"

##
# Your previous /Users/kevet/.bash_profile file was backed up as /Users/kevet/.bash_profile.macports-saved_2012-05-17_at_17:26:03
##

# MacPorts Installer addition on 2012-05-17_at_17:26:03: adding an appropriate PATH variable for use with MacPorts.
export PATH=/opt/local/bin:/opt/local/sbin:/opt/local/lib/gromacs/bin/:/usr/local/bin/scwrl4/:$PATH
# Finished adapting your PATH environment variable for use with MacPorts.





ps. 

Mac path  >> sudo vim /etc/paths

http://keveting.blogspot.com/2008/11/mac-os-x-105xpath.html