Along with the familiar startup sound, a computer installed in the exhibition space suddenly launches, and the default desktop image begins to move. The title of this work is at once the name of a Mac operation system that was inspired by the Sierra Nevada, and the video that is shown is all about that mountain range in California, including a matter-of-fact narration telling a tragic story during the American western frontier period. During the playback of the video, viewers are free to access other videos and previously viewed Google Street View images via links on the desktop.

One aim in the development of information operation devices is the improvement of usability, or in other words, to make the device itself as “invisible” as possible. The encounter on the desktop between the macOS itself and facts related to the place that inspired its name recalls the historical backgrounds and material characteristics of the device that is supposed to disappear from our conscious mind.