in reply to
Re: Extract SSH_AUTH_SOCK from SSHKeychain (OS X)
in thread Extract SSH_AUTH_SOCK from SSHKeychain (OS X)
You could also just go into the SSHKeychain preferences and check the box that says 'Manage (and modify) global environment variables', so that it will set $SSH_AUTH_SOCK for you.
Erm. No. The whole point is that the way that SSHKeychain manages the environment (via the .MacOSX/environment.plist in your home directory) doesn't propagate to some things like cron which are independent of your login.