OS X 10.9, which is internally codenamed “Cabernet,” will focus on various “power-user” enhancements and take core features from iOS, according to our sources. Unlike operating system updates such as OS X Leopard and OS X Lion, OS X 10.9 will likely not be an overhauled approach to how the operating system feels and functions.

The new operating system includes major enhancements to the Finder application such as tags and tabbed browsing modes. Those additions are notable as many pro-users have relied on third-party solutions and hacks to enable these features. Additionally, the new operating system will include a new Safari web browser with a redesigned backend for improved page loading, speed, and efficiency…