Marcus Steven Zarra (born July 31, 1970) is a Macintosh software developer, writer and teacher. He is probably best known for the blog that he writes with Matt Long called Cocoa Is My Girlfriend. Marcus Zarra is the sole owner of Zarra Studios and develops software for both the Macintosh platform and the iPhone platform. Marcus is currently working on a book for The Pragmatic Programmers on the subject of Core Data. In addition to his book, he has been published in numerous magazines including: and many others. He currently resides in Colorado Springs, Colorado with his wife, Lyndia and four Shih Tzu: Ginger, Copper, Zeus and Faye.