Apple has seeded this morning macOS Sierra 10.12.5 beta 5 for developers, build 16F71b. This update can be downloaded by developers via the Mac App Store’s Update tab.
The release comes one week after the fourth beta of macOS 10.12.5 was released, alongside other betas for iOS 10.3.2, watchOS 3.2.2 and tvOS 10.2.1, however we have not seen new beta updates for the latter three operating systems. Apple released iOS 10.3.2 beta 5 on Thursday.
So far, these updates haven’t released major features, but rather appear to include fix bugs and include typical performance enhancements.
We are close to the final release of these updates, which should become available soon, as WWDC 2017 kicks off in early June.