Mangaka, a Mac user.
Japanese name: 唯 登詩樹 (Yui Toshiki)
Previously used pen name: 加藤 雅基 (Katou Masaki)
Site name: Yui's Shed
https://www.pixiv.net/users/1453307
https://www.pixiv.net/stacc/kapoow
https://twitter.com/yui_toshiki
https://twitter.com/intent/user?user_id=112437673
https://sketch.pixiv.net/@kapoow
http://doujinshi.mugimugi.org/browse/author/513/Yui-Toshiki/
http://www.mangaupdates.com/authors.html?id=173
http://en.wikipedia.org/wiki/Toshiki_Yui
http://ja.wikipedia.org/wiki/唯登詩樹
http://twitpic.com/photos/yui_toshiki