Apple has seeded a new beta of OS X Yosemite 10.10.3 to both developers and public beta testers today.

Build 14D127a

The update, which bumps the build number up to 14D127a, brings the usual usual bug fixes and is available now from the updates section of the Mac App Store and the Apple Developer Center.

Of course, OS X 10.10.3 also introduces the new Photos app for Mac, which is set to replace both iPhoto and Aperture for managing and editing photos on your Mac. In addition, OS X 10.10.3 brings a number of stability and security improvements as well.