|- If your Samsung LCD monitor uses a DVI cable, you need to buy the Apple Mini-DVI-to-DVI adapter, part number M9321G/B. http://store.apple.com/1-800-MY-APP...|
- If your Samsung LCD monitor uses a VGA cable, you need to buy the Apple Mini-DVI-to-VGA adapter, part number M9320G/A. http://store.apple.com/1-800-MY-APP...
Once you have the right adapter, just plug the adapter into your Macbook's mini-DVI port, and plug the monitor cable into the adapter. You should then be able to display your laptop's screen on the monitor.
I don't know much about macs, but I believe it's possible with the right adapter. Check out the apple store links above.