How To: Enable Dark Mode in Yosemite (OS X 10.10)
Yosemite has a lot of great features. But some of the major features seem to hide from users. Even though this may be obvious for some, it took me a while to find how to enable one of OS X's newest features - how to enable (or disable) dark mode:
1. Go to Finder > System Preferences > General.
2. Put a check mark in the use dark menu bar and dock.
3. That's it.