OS X Mavericks v10.9.4 (13E28) (MacAppStore)

With more than 200 new features, OS X Mavericks brings Maps and iBooks to the Mac, introduces Finder Tabs and Tags, enhances multidisplay support, and includes an all-new version of Safari. The latest release of the world's most advanced desktop operating system also adds new core technologies that deliver breakthrough power efficiency and responsiveness.

- Explore select cities in stunning, photo-realistic 3D with Flyover.
- See holidays and Facebook events in Calendar.
- Enter event locations fast with address autocompletion.
- Browse longer thanks to new core technologies that boost energy efficiency.
- Easily access your bookmarks, Reading List, and Shared Links in the new Sidebar.
- Don't worry about remembering passwords - iCloud Keychain fills them in so you don't have to.
- Access the Dock and the menu bars on each display.
- Organize files with tags no matter where they're located - in iCloud or on your Mac.
- With energy-saving core technologies in OS X Mavericks, you can surf the web longer on a single charge.

What's New in Version 10.9.4
The 10.9.4 Update improves the stability, compatibility, and security of your Mac.
This update:
- Fixes an issue that prevented some Macs from automatically connecting to known Wi-Fi networks
- Improves the reliability of wake from sleep
- Includes Safari 7.0.5

Compatibility: OS X 10.6.8 or later