The MacCAM (also known as MacCam or Mac Cam) is a new piece of technology, consisting of slow motion cameras, used to broadcast instant replays of close or controversial landing shots on or near the baseline, often in Tennis. MacCam was developed by “FastCAM Replay LLC” and “DEL Imaging Systems LLC”. The system was used at the 2004 U.S. Open to demonstrate several poor calls by chair umpires. Several close calls were challenged by Serena Williams in a controversial quarterfinal loss to Jennifer Capriati, which were marked with the help of MacCam. In recent times, it has been replaced with new technology such as ShotSpot system.