CoolStream is a live QuickTime Streaming server application for Power Macintosh, PowerBook, iMac and iBook computers running Mac OS 9.0 (or higher). CoolStream uses QuickTime Streaming to broadcast live video and audio from your Macintosh to other users on the network. CoolStream can stream live video and audio in two basic ways unicast and multicast. Unicast (one-to-one) allows you to send a broadcast with video and audio streams to one recipient. Multicast (one-to-many) allows you to send a broadcast with video and audio streams to many recipients, however your network infrastructure must support multicasting.