Please be aware some fire wire audio interfaces are experiencing problems with the newer macbooks which have the Lucent or Agere fire wire chipsets. What has been reported on a another forum is the Lucent or Agere chipsets can cause the fire wire interfaces to issue a fire wire bus reset shortly after start of data transmission. For detailed information please see the link at the below for more information.
http://www.gearslutz.com/board/music...-2007-a-3.html