I wanted to use a different ssh-agent on OSx which is a very simple "I want to set a global environment variable." That's literally impossible in OSX. So, I had to open a shell and every app that I wanted to use my ssh-agent had to be launched from that shell.
ah, nice! I haven't tried to figure this out since Yosemite was new and it looks like there's now instructions for how to do it. Thanks for this! If I ever have to go back to OSX, now I know!
