OS X Yosemite 10.10.5 Update
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
For detailed information about the security content of this update, please visit: http://support.apple.com/kb/HT201222For more detailed information about this update, please visit: http://support.apple.com/kb/HT205004.
For detailed information about the security content of this update, see Apple security updates.
See http://support.apple.com/kb/HT5044 article for details on how to verify the authenticity of this download.