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Only if you speak with the French.
More seriously, if you are referring to Apple's 'Bonjour' software, then no you don't need it.
Bonjour is a zero-conf network discovery service used by Apple for products like iTunes and Safari.
it comes with apple programs.. its like with itunes or something.. it doesnt rlly do anything other then connect to wireless devices
Bonjour is the French word for hello.
bonjour is hello if that is what you are after