Apple released OS X Mavericks 10.9.3 update and its recommended for all Mavericks user to install this update. According to Apple this update contains improved security, stability and compatibility for you Mac.
How to Install OS X Mavericks 10.9.3 Update
Before installing any updates make sure you have back up data on Mac, I would suggest you to take backup with Time Machine. You should have a good internet connection to download this update and size of the update may vary on different computers.
Click on Apple menu and select Software update or open App Store and click on Updates tab. You will see list of available updates for your Mac.
If you don’t see v10.9.3 update in the list press Store menu and select Reload page option (cmd+r shortcut to reload page). There may be few updates that you have to install prior to v10.9.3 update.
Direct Download Links
If you are facing problems in updating through App Store or you want to install this update on multiple computer then its good idea to download OS X Mavericks 10.9.3 update from these links.
OS X Mavericks 10.9.3 Update : http://support.apple.com/kb/DL1745
OS X Mavericks 10.9.3 Update (Combo) : http://support.apple.com/kb/DL1746
OS X 10.9.3 Update Details
- Improved support for 4K display.
- Now you can sync contacts and calendars between Mac and iOS devices with USB.
- Improved VPN connections using iPsec
- Safari 7.0.3
- see this link for complete details http://support.apple.com/kb/HT6228