About the OS X Yosemite v10.10.1 Update

About the OS X Yosemite v10.10.1 Update
 
The OS X Yosemite v10.10.1 Update is recommended for all OS X Yosemite users.

Updating your system
You should back up your system before installation. To do this you can use Time Machine.
Do not interrupt the installation process once you have started to update your system.
You may experience unexpected results if you have third-party system software modifications installed, or if you've modified the operating system through other means.
Use Software Update to check for the latest Apple software using the Mac App Store, including this update.
Other software updates available for your computer may appear, which you should install. Note that an update's size may vary from computer to computer when installed using Software Update. Also, some updates must be installed prior to others.

About the update
 
The OS X Yosemite v10.10.1 Update improves the stability, compatibility, and security of your Mac. This update:
Improves Wi-Fi reliability
Improves reliability when connecting to a Microsoft Exchange server
Resolves an issue that may prevent Mail from sending messages through certain email service providers
Addresses an issue prevents connecting to remote computers using Back to My Mac
Resolves an issue where sharing services, Notification Center widgets and Actions may not be available
Addresses an issue that could cause Notification Center settings to not be retained after a restart
Addresses an issue that might prevent the Mac App Store from displaying certain updates
Addresses an issue that could prevent some Mac mini computers from waking from sleep
Resolves an issue that might prevent Time Machine from displaying older backups
Addresses an issue that might prevent entering text in Japanes
Security Content
 
For detailed information about the security content of this update, see Apple security updates.