Kensington Turbo Mouse

The Kensington Turbo Mouse is a series of trackballs for Macintosh. Its PC counterpart has been marketed as the Expert Mouse.

Classic ADB versions
The Turbo Mouse dates back to the late 1980s and was one of the earliest ADB trackballs, designed to complement Apple Computer's first ADB keyboards. It featured a 2-button design and became the bestseller of its category. The 57 mm trackball size matched that of a regulation and could be replaced with an. was known to use this model for digital music composition. The last iteration of the ADB-only Turbo Mouse in the 1990s was version 5.0, which was updated to a 4-button configuration. It could support any Mac with an ADB port that could run System 6.0.7 or later.

USB and wireless versions
A USB version was introduced in 2000 with support for Mac OS 8.1 and later. It also included a legacy ADB port. However, the MouseWorks software was not updated for Mac OS X until 2001, which was necessary to support more more than two buttons. This was superseded by the Turbo Mouse Pro in 2002, which offered a choice of USB or wireless support.