OS X Mavericks 10.9.3 released, includes Retina mode for external 4K displays

This morning Apple released OS X Mavericks 10.9.3, a big update that brings a couple of major new features to the desktop operating system. First, improved 4K display support, which allows easy Retina scaling on external ultra high definition displays. We've been using this functionality for a couple of months since it was included in the beta, and it works as expected. Rather than creating a ridiculously gigantic desktop where you could barely read text, instead you can choose to scale to a Retina mode that just makes everything nice and sharp.

Others will be happy to know that OS X 10.9.3 also features the return of the ability to sync contacts and calendars between a Mac and iOS devices over USB. Hit the Mac App Store to grab the update, and take a look at the full changelog after the jump.

• Improves 4K display support on Mac Pro (Late 2013) and MacBook Pro with 15-inch Retina Display (Late 2013)
• Adds the ability to sync contacts and calendars between a Mac and iOS device using a USB connection
• Improves the reliability of VPN connections using IPsec
• Resolves an issue that prevented Font Book from installing PostScript Type 1 fonts
• Improves reliability of copying, editing and inspecting permissions of files on an SMB file server
• Improves reliability of network home directories
• Improves stability when installing configuration profiles
• Improves login speed for users in Active Directory groups
• Includes Safari 7.0.3