Ok, I have my iMac wireless, and I have an ethernet plugged into my iMac that is also plugged into my Xbox 360. Now, how do I get on Xbox Live with the 360? Thanks.
litte on side: your speeds are going to be slower on xbl by going from the wireless to the imac then taking the connection and going to the xbox from the imac. i used to do that (but with a laptop) and my speeds were piss poor and then i just plugged the xbox in from just a cable and the speeds were golden
no crossover cable is required (apple auto senses this, I think its called MDI/MDX or something) but you will have to share your wireless connection to the ethernet and you should be good to go...