Apple has released a fifth beta of OS X 10.11.4 to developers and public beta testers. The build number is 15E56a.
This is a pre-release version of OS X v10.11.4. Please refer to the release notes for complete installation instructions.
Apple has told testers to focus on iBooks, Messages, Notes, and Photos. 10.11.4 brings secure notes, live photos to messages, and other stability/performance improvements.
You can download the OS X Software Update Seed Configuration Utility from the link below.
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