Well composite isn't an HD signal so it's not going to be a great picture to begin with. To do that though, you'd just want a box to convert to composite and then a composite splitter and some long cables. composite can go quite a long distance without any signal loss, but again isn't HD.
If your macbook has a DVI to VGA adapter (which i believe most come with), you can use this part here to get the signal to composite:
PC to TV converterIf you would prefer to use something with an HD quality picture let me know and i'll show you some of the options.