Hey man. Here's the deal. Apple cut corners when putting the fire wire chip into the macbook. The macbook has a generic fire wire port, which is integrated right onto the motherboard. The Macbook Pro actually has a dedicated Texas Instrument card built right into the laptop, so fire wire runs much smoother. Several things can interfere with your audio stream on the macbook because of the shotty port you've been given. Trust me. I've been dealing with this for a while. First, disable the 1394 network driver in the device manager. Also, whenever you want to record or play back using the fw, you'll need to disable the wireless card as well. That is also found in the device manager under networking. It's the atheros network adapter. Also, disable all bluetooth radios. Lastly, make sure Jaws is running through the fw and not your built in card. Whenever jaws plays back through the built-in sound card, it steals resources away from the fire wire port for some reason. This was true with Mlan, but I'm assuming it's also true with just plain asio. I hope this helps. I know it blows and is really inconvenient, but this is what I've found having used Sonar with the macbook for a few months. Hope this helps. Reeves PLEASE READ THIS FOOTER AT LEAST ONCE! To leave the list, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=unsubscribe If this link doesn't work then send a message to: ddots-l-request@xxxxxxxxxxxxx and in the Subject line type unsubscribe For other list commands such as vacation mode, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=faq or send a message, to ddots-l-request@xxxxxxxxxxxxx and in the Subject line type faq