You can choose from four versions of the theme, namely: Yosemite Black-Blue, Yosemite Black-Blue2, Yosemite Black-Gray or Yosemite Black-Gray2, which differ through window colors and the availability of the address bar. Please note that Uxtheme is not yet fully compatible with Windows 10, so some errors might occur. This is accomplished with the help of the Uxtheme package. In order for the Yosemite Black Theme to be properly installed, you must first go through a series of steps that will allow you to deploy third-party themes on a Windows computer. The installation process requires more than just selecting the desired item from the 'Personalization' screen.
Suggestively called Yosemite Black Theme For Windows 10 Technical Preview, it comes in four versions that change the color of your windows and the desktop background. If you are amongst the ones that took the latest Windows 10 Technical Preview for a drive, you will be happy to know that there is a theme that can help you change its default appearance to match OS X Yosemite.