two things come into my mind:
- did you launch the VE3 service on the slave at least 1 time having a monitor attached? a message shows up asking if *a firewall exception shall be made for this application* which you have to cinfoirm with *yes* for obvious reason.
- your network ranges (IP adresses) and gateways (labeled router in OS X) are set correctly, both computers reside in the same workgroup? (only one gateway per computer, different NICs need different IP ranges)
to get the picture please launch network utility on the master, select the TAB telnet and try to contact the slave's IP address on port 6477 (TCP), if that works we have to investigate furter, if not there is a communication problem in your network.
hth, christian
ps: on the master computer port 6479 UDP has to be open to allow the slave announcing itself to the master
and remember: only a CRAY can run an endless loop in just three seconds.