Hi, first time post........ I just got a 2.7. that didn't come with a modem. I'm using OS 10. 4.3. Network preference does not recognize the USB modem. I've heard from other sites that a USB Modem may not work with OS 10.3. I don't know if its fact or fiction. I have found a site where I can buy and internal modem and istall instructions. Anybody done this? Also suppose to be a external box from action tec that works??? Suggestions??