Hi, this is a concept for Mac OS X Syrah, expected to be published in September 2014. It's based on the new flat design approach of the Contacts and Notes App introduced in Mac OS X Mavericks. Checkout the Concept.jpg. I hope you like you like it. Feedback is highly appreciated.
* built with Sketch *
Sidenote: I'm not an Icondesigner, so these could be improved ;)
Edit: Also available at http://www.behance.net/gallery/Mac-OS-X-Syrah-Concept/15338159
Edit: Guilherme Rambo on behance got inspired by the concept and just coded some of it. Checkout on github: https://github.com/insidegui/FinderSyrahUI
Update: Changed title bars back to gray.