This update: 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 Includes Safari 7.0.3 For detailed information about this update, please visit: About the OS X Mavericks 10.9.3 Update For d