Apple's latest beta version of OS X Yosemite 10.10.4 is out for developers and public testers, inching us ever closer to the official public release. For those keeping track at home, this release is numbered 14E36b.
OS X Yosemite 10.10.4 gets a new public beta
The 10.10.4 update is expected to address several annoying bugs, including an issue that causes some Macs to drop their WiFi network connection. Apple hasn't said when the final release will be available, but it's likely to come at the end of June when the company launches its Apple Music service and an updated version of iTunes.
Apple replaced discoveryd in the 10.10.4 beta with mDNSResponder from previous versions of OS X to address network-related issues that caused heavy CPU usage.
Apple also has a beta version of OS X 10.11 El Capitan available, although only for developers. The public beta will be available in July, presumably after OS X 10.10.4 is officially available.
The OS X 10.10.4 public beta is available via the Updates tab in the App Store app. If you aren't participating in the public beta program, but want to, sign up for free at Apple's website.