diff --git a/runcoms/zshrc b/runcoms/zshrc
index acf38fc..9e518ad 100644
--- a/runcoms/zshrc
+++ b/runcoms/zshrc
@@ -23,4 +23,6 @@ bindkey "\en" history-beginning-search-forward
 alias be='bundle exec'
 alias tat='tmux new-session -As `basename $PWD`'
 
+function eject { command hdiutil eject `df | grep Volumes | grep "$@" | ruby -ne 'puts $_[/^[^ ]*/]'`; }
+
 [[ -s "$HOME/.zshrc.local" ]] && . "$HOME/.zshrc.local"