Apple has released the following betas to the developers:

Apple Seeds Sixth Beta of iOS 10.3 to Developers
Apple Seeds Sixth Beta of macOS Sierra 10.12.4 to Developers

Apple Seeds Sixth Beta of iOS 10.3 to Developers

Apple today seeded the sixth beta of an upcoming iOS 10.3 update to developers, just under one week after seeding the fifth beta of iOS 10.3 and three months after the release of iOS 10.2, the last major update to the iOS 10 operating system.

Registered developers can download the sixth iOS 10.3 beta from the Apple Developer Center or over-the-air with the proper configuration profile installed.

Read full article @ MacRumors

Apple Seeds Sixth Beta of macOS Sierra 10.12.4 to Developers

Apple today seeded the sixth beta of an upcoming macOS Sierra 10.12.4 update to developers, just under one week after seeding the fifth macOS Sierra 10.12.4 beta and over a month after releasing macOS Sierra 10.12.3.

The sixth macOS Sierra 10.12.4 beta is available for download through the Apple Developer Center or the software update mechanism in the Mac App Store for those who have previously installed a beta.

Read full article @ MacRumors