Hack:applescript
From Music Player Daemon Community Wiki
[edit] Running mpd on osx using an applescript
launch the script editor application and copy the following lines
do shell script "/opt/local/bin/mpd /opt/local/etc/mpd.conf"
Compile it to check it works. Note that /opt/local/bin/mpd is the path for a macports installation, adjust it to your needs.
Save the script in a chosen folder and in the format field select "application", then go to the system preferences and put the application you just created in the start-up list for your user.
Now mpd should start on boot with settings given in /opt/local/etc/mpd.conf .
