open in tmux fails for all files
There seems to be a usernamespace problem if you want to open OS X apps inside tmux.

To fix that install with Homebrew:

brew install reattach-to-user-namespace


and put this inside your ~/.tmux.conf for the Bash shell:

set-option -g default-command "which reattach-to-user-namespace &gt; /dev/null &amp;&amp; reattach-to-user-namespace -l /bin/bash || /bin/bash"


after that you should be able to open files also in tmux.

Source I got this information: http://uber.pro/here-fishy-fishy/