Hi
I'm a macbook pro user but i used to run 3 chars on a macbook. In terms of a broadcasting app i'd give plexer a damn good look, it cost £15 i think and in my eyes is totally worth the money.
Other than that im not quite sure what you are asking? Jamba does work for macs as its an in game addon.
Some clear questions would make it easier to help you
Thanks and Good Luck Dude

-Holmeser