What's New in Version 10.9.3
The 10.9.3 Update improves the stability, compatibility, and security of your Mac.
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
https://itunes.apple.com/us/app/os-x-mavericks/id675248567?mt=12
The 10.9.3 Update improves the stability, compatibility, and security of your Mac.
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
https://itunes.apple.com/us/app/os-x-mavericks/id675248567?mt=12