During an interview, Engelbart said 'SRI patented the mouse, but they really had no idea of its value. It was there they discovered the mouse, invented by Douglas Engelbart while he was working at SRI International (SRI) the mouse had subsequently been incorporated into the graphical user interface (GUI) used on the Xerox Alto. In 1979, Apple was planning to develop a business computer, and arranged a visit with the Xerox Parc research center to view some of their experimental technology. The rubber ball tracking mechanism of the ADB Mouse II.
Apple's current mouse, the Magic Mouse 2, uses laser tracking.
Mice made by Apple contained a ball-tracking control mechanism, until the Pro Mouse in 2000 when Apple moved to an optical-based tracking mechanism. Mice manufactured by Apple previously only had a single button control interface, until the Mighty Mouse in 2005, featuring a clickable scroll ball and multiple programmable buttons.
