OS X Yosemite 10.10.4 Update
The OS X Yosemite 10.10.4 update improves the stability, compatibility, and security of your Mac, and is recommended for all users.
- Improves networking reliability
- Improves Migration Assistant reliability
- Addresses an issue that prevented certain external monitors from functioning properly
- Improves the reliability of upgrading iPhoto and Aperture libraries to Photos
- Improves reliability when syncing photos and videos to iCloud Photo Library
- Addresses an issue that caused Photos to quit unexpectedly after importing some Leica DNG files
- Resolves an issue that could delay outgoing email messages in Mail
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.