Não podes ser mais especifico??? Fiz uma pesquisa no goolge por bonjour software e fui dar com isto ... não sei se é o mesmo ao que te estas a referir:
"Bonjour, formerly Rendezvous, is Apple Inc.'s trade name for its implementation of Zeroconf, a service discovery protocol used in Apple's Mac OS X operating system from version 10.2 onwards. Intended for use on local area networks, Bonjour uses multicast Domain Name System service records to locate devices such as printers, as well as other computers, and the services that those devices offer."
Cumps
Peter