Along with iOS 8.4, Apple released OS X 10.10.4 on Tuesday. The update fixes several issues, most notably the annoying discoveryd problem that caused no end of headaches for Yosemite users connecting to WiFi networks.
Apple fixes discovered bug, more, in OS X Yosemite 10.10.4 update
- Apple's release notes say the update includes:
- Improved network reliability
- Improved Migration Assistant reliability
- Fixed a problem where some external monitors didn't function properly
- Improved the reliability of upgrading iPhoto and Aperture libraries to Photos
- Improved iCloud Photo Library syncing
- Fixed a crash issue with Leica DNG files
- Fixed a problem where outgoing Mail messages were delayed
The OS X 10.10.4 update is free and available via Apple's Update tab in the App Store app. You can find it by selecting Apple menu > App Store > Updates.