The first beta of Mavericks 10.9.3 was released almost two months ago. But yesterday Apple provided employees with a new and improved 13D57 build with improved support for 4K displays. The update includes developments in syncing between a Mac and an iOS device using USB. The seed frequency is considerably increased with a number of new release notes indicating a public release very soon.
9to5mac.com shared the release notes as follows:
The OS X Mavericks 10.9.3 Update is recommended for all OS X Mavericks users. It improves the stability, compatibility, and security of your Mac. This update:
- Improved 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
Watch a video about the beta: