

Here is how to use it to verify that the downloaded update has not been altered from that on Apple's servers. On the OS X Mavericks 10.9.1 updates page, Apple has included a SHA 1 checksum for the download (currently the checksum is 07db93308b62c90b59c43ae075e2784ef8f20bfc). Since this is the initial update, only a "delta" update is available, so there will not be a standard "combo" update that commonly accompanies OS X updates. Apple also has a standalone update available that can be downloaded and installed manually. The update is available via the Mac App Store, and can be accessed through the Software Update service in the Apple menu.

Addresses an issue that may cause Japanese keyboards to retain a previously used language.Addresses an issue that may cause multiple prompts to unlock "Local items" keychain.Fixes an issue that prevented iLife and iWork apps from updating on non-English systems.Resolves an issue that prevented VoiceOver from speaking sentences that contain emoji Most of the fixes and enhancements are of the not-really-to-do-with-security sort, but the update includes a new version of Safari, with remote code execution patches.Fixes an issue that prevented contact groups from working properly in Mail.

Improved support for Gmail in OS X Mail, and fixes for users with custom Gmail settings Improves the reliability of Smart Mailboxes and search in Mail.
