Is this at all possible??

[mynameisstiv]

can i make my line in on my macbook a second line out??

 

[Wireless Buddy]

can i make my line in on my macbook a second line out??

I seriously doubt it. You could just buy an audio splitter and plug that into the Line Out.

 

[mkrishnan]

What are you trying to accomplish, O one line poster? 😛

If you just want two outputs of the same thing, as mentioned, get a splitter. If you want individually manipulable outputs, get a USB or Firewire audio output device....