I'm doing this successfully, not on a MacBook, but on an iMac, running Mac OS X.
I don't remember the details exactly, but I think I just enabled
Internet Sharing in
System Preferences ->
Internet & Wireless ->
Sharing, similar to this procedure:
http://docs.info.apple.com/article.html?path=Mac/10.6/en/8156.htmlThen I ran an
ifconfig command in a terminal window, to check which IP address that got assigned to the Ethernet interface, and in the RRC set an IP address in the same subnet...
73,
Jonas/SM5PHU