Re: emacsclient not working anymore on Mac OS X

[Richard Stallman]

    I notice you will also get this error message if you have executed sudo 
    -s to become root. I presume the emacsclient is not capable of 
    connecting to another users server?

That is probably correct.  I suppose there could be a feature to
specify the intended user name, for running emacsclient as root.
An envvar would be the convenient way, rather than a command option.