『アップルが社内で特別に用意したというスケルトンな筐体仕様の同モデルは、
いろいろと外からでも各種パーツや構造をチェックできるようになっていて、
世界に10台しか存在が確認されていない』
“only about 10 of these machines were ever made, and they lived within the walls of Apple. Apparently, these machines were built for the Macintosh R&D team at Apple to verify the placement of internal components, and never were intended for production.”