Apple has released OS X 10.10.5. This update contains fixes for Mail, Photos, and QuickTime, along with assorted bug fixes and improvements.
Here's what you'll get with OS X 10.10.5:
The OS X Yosemite 10.10.5 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.
- Improves compatibility with certain email servers when using Mail
- Fixes an issue in Photos that prevented importing videos from GoPro cameras
- Fixes an issue in QuickTime Player that prevented playback of Windows Media files
You can download this update from the Updates section of the Mac App Store.