Apple has released a new security update for OS X Yosemite, and a separate version of the update for Macs released in early 2015, including the new 13″ MacBook Pro with Force Touch trackpads and the upcoming MacBook.
The update is available for users running OS X 10.10.2 in the Updates tab of the Mac App Store, or as a standalone installer at the links above. Users on the public beta of OS X 10.10.3 apparently do not need the update, since the newer operating system likely already includes fixes for the problems addressed by this release.
Apple has not yet released the update notes to explain what has been fixed.
iPhoto has also been updated to improve compatibility with the upcoming Photos app that replaces it:
What’s New in Version 9.6.1
• Improves compatibility when migrating iPhoto libraries to the new Photos app in the OS X Yosemite 10.10.3 (available this spring) • Fixes an issue that caused iPhoto to display only the first 25 images in a Facebook album • Fixes an issue that could cause iPhoto to become unresponsive when printing an image
The update is available to iPhoto users through the Mac App Store.