Apple has filed a patent for an "active enclosure for computing device".

The invention, attributed to Duncan Kerr and Steve Hotelling is described thus: "The computing device includes a housing having an illuminable portion. The computing device also includes a light device disposed inside the housing. The light device is configured to illuminate the illuminable portion."

The patent, filed on February 6, 2004, describes how Macs can be modified so that they can alter their physical appearance through lights encased within.

The device is described as "chameleonic" because it is able to alter its physical appearance, like a chameleon.

A Mac Observer report includes pictures from the patent application. According to the report it would be possible to change a Mac's colour via the control panel.

The report notes: "The ability to achieve almost any colour casing would seemingly have broad appeal and make the devices unique, while at the same time lower Apple's costs and inventory positions."