Apple has released v10.9.1 system update for OS X Mavericks. The first update to Apple's latest operating system for Macs brings a bunch of improvement and bug fixes, including remedying several Mail.app issues.
Other changes include Safari 7.0.1, which brings bug fixes and enhancements of its own; and fix for an issue that could prevent iLife and iWork apps from updating on non-English systems.
As usual, to download and install the update, click the Apple menu and choose Software Update to check for the latest Apple software via the Mac App Store, including this update. The update's size may vary from computer to computer when installed using Software Update, depending upon what earlier updates you had installed.
You can also download the manual update installer. This is especially useful when you need to update multiple computers but only want to download the update once. These versions of the standalone installers are available from Apple Support Downloads.
About the update
The OS X Mavericks v10.9.1 Update is recommended for all OS X Mavericks users. It improves the stability, compatibility, and security of your Mac. This update includes: