How to get my mac to acknowledge my iphone 3g?

I got an iphone 3g from a friend yesterday. Itll charge when i plug it in my mac desktop but itunes will not show up at all. I looked through system profiler and its not there either. I'm pretty sure its the iphone itself but i don't know what to do.

Its the iphone3g you would make better use of it as a cup holder lol but if thats your real phone highly recommend upgrading and for the record your mac won't reconize it because that product was discontinued back in 08 sorry