Macne:Bon (マクネボン Makunebon?, "Macne Friends") was a fanbook launched in 2009, which contained information on the Macne family, such as concept designs, short comics on their antics and adventures, as well as origin stories by Gomoku herself.
The first main volume contained the preliminary sketches and designs for when Haluna was trying to create a "Vocaloid for Mac" named "Macne Miku" (Mac音ミク). These early designs reflected the idea that they wanted to make a Hatsune Miku for Mac, having her look similar in style.
Eventually ditching the Miku formula, more original ideas and designs were created before finally deciding on the concept that we have today.
This volume also shows the concept for Macne Coco White, with one of her only original concepts.