That suite includes iOS 9.3, watchOS 2.2 and OS X 10.11.4...
It’s one of the reasons why, after approximately 20 years of beta testing for both Microsoft (mostly) and Apple (most recently), I’m NOT jumping on that train on any of my production-level equipment. It’s just not worth it any more.
It used to be that when an operating system hit the BETA stage, it was pretty much operational. You could count on that version of (whatever it is) holding its own. While there would obviously be problems, those problems nearly always came with some level of (reasonable) work around that wouldn’t take your PC/ mobile device out of the picture.
That’s not the case now a days. More often than not, you could be taking your PC’s life into your hands if you aren’t careful.
So with this light of caution CLEARLY flashing in our faces, you may be interested to know that Apple has released the sixth beta of iOS 9.3, and OS X 10.11.4, both of which are available to both developers and public beta testers. Apple released watchOS 2.2 Beta 6 to its registered developers only.