I've built the WiTap example both for my iPhone and for the simulator. Bonjour finds properly the other part on both, nevertheless
(a) if I click the iPhone name on the simulator, all works well (the "game" does start)
(b) if, though, I tap the Mac name on the iPhone, it goes blue--and nothing happens (in the code, the stream delegate method gets never called, and the NSStreamEventOpenCompleted event for boths treams does not come).
Looks to me like the Mac refuses connection on the socket perhaps? Thus, I sort of suspect the firewall; nevertheless, the behaviour persists regardless the firewall is on or off ("Allow all incoming connections").
I'd be grateful for any idea what and how to check further. Thanks a big lot!
Note: I had the Secure Client VPN installed on the development computer; thing is known to mess with the firewall. Nevertheless, I have uninstalled it and re-booted.