The Mac Mini is a personal computer made by Apple Inc. It is small for a desktop computer, at 6.5 inches (16.5 cm) square and 2 inches (5.1 cm) tall. It was introduced on January 22, 2005. The newest model came out on October 20, 2009. It weighs 2.9 pounds (1.31 kg). The Mac Mini's power supply is outside of the machine. It is about one third of the size of the computer itself.