This should be added to a FAQ somewhere. Took me ages to figure it out on my own, especially since the error msg is so generic -> http://pig-rabbit.com/tmux-and-launchctl

Just use https://github.com/ChrisJohnsen/tmux-MacOSX-pasteboard. Works for pbcopy, pbpaste, and launchctl.

Then just alias launchctl to "reattach-to-user-namespace /bin/launchctl"