Fire up the Mac App Store, people, Mac OS X 10.9.3 is now available. The update brings a handful of improvements to Mavericks, including 4K display support for the new Mac Pro and late-2013 MacBook Pro laptops. Also included is the ability to sync contacts and calendars with an iOS device over USB (or, you know, you could just use iCloud or any other cloud service).
Additionally, 10.9.3 improves support for VPN connections using IPsec and comes bundled with the previously-released Safari 7.0.3.
The Mac OS X Mavericks 10.9.3 update is available now via the Mac App Store. It's a heavy update, weighing in at 461MB on our retina MacBook Pro, though your megabytes may vary.