OS X Yosemite 10.10.3 Public Beta. Featuring the all-new Photos for Mac.
The OS X Yosemite 10.10.3 Public Beta includes the new Photos app, and it’s ready for you to test-drive. Remember to review the guidelines carefully and back up your Mac before installing the update.
Photos is an easy upgrade from iPhoto or Aperture.
Get started with the OS X Yosemite Public Beta Guide
We look forward to your feedback so we can continue to make OS X and Photos even better.
The OS X Team
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