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Amid the hype of the iOS 8.4 release, which included the new Apple Music streaming service, Apple also rolled out another update yesterday – OS X 10.10.4. The new update contains mostly “under-the-hood” bug and security fixes, but contains several performance improvements as well.
The biggest change in OS X 10.10.4 comes in the form of a network reliability fix. Many OS X users have been experiencing Wi-Fi connectivity problems in the past several months. The issue was a new network process called “discoveryd”, which was causing a host of networking errors – from failure to resolve DNS names, to creating duplicate machine names on the network, and more. For OS X 10.10.4, Apple reinstated an older process called mDNSResponder to handle networking processes. mDNSResponder worked well in previous versions of OS X, going all the way back to OS X 10.2 Jaguar, and has been modified to support newer technology introduced in Yosemite. The change should result in more stable network reliability across the board.
OS X 10.10.4 is available now for upgrade. It’s likely that we will see one more OS X update (10.10.5) before the official release of OS X 10.11 El Capitan, currently being beta tested by developers.