When I run `terminal-notifier` from `tmux` on OS X 10.10 Yosemite, it hangs: ``` terminal-notifier -message "his name was robert paulson" # ... hanging ``` It works fine when running it from outside tmux. This may have something to do with `reattach-to-user-namespace`. My tmux is configured with this line: ``` set-option -g default-command "reattach-to-user-namespace -l zsh" ``` Which was taken from the instructions from [this page](http://robots.thoughtbot.com/how-to-copy-and-paste-with-tmux-on-mac-os-x).