Apple has just released a new beta seed of the upcoming OS X 10.10.4 update. Users who are part of the company’s AppleSeed beta program and registered Mac developers can download the operating system from the Updates tab of the App Store or the Mac Developer Center.

This is the fourth developer seed that has been released. It comes with a build number of 14E26a. The previous build was released on May 11th with a build number of 14E17e.

The upcoming OS X 10.10.4 currently highlights improvements to security and performance. Meanwhile, the current iOS 8.4 beta also in development includes an all-new Music app with changes to iTunes Radio, iBooks, and will support Apple’s upcoming subscription music streaming service as we’ve reported.

Changes

This beta removes the often criticized discoveryd networking software in favor of the old mDNSResponder.

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