Apple Seeds OS X 10.10.4 Beta 2
Apple has today seeded the second beta of OS X 10.10.4 to developers. This release comes a week and a half after the first version. They have also seeded by the first beta to public beta testers. There aren't a whole lot of things that are new with this beta. It's mostly under the hood and bug fixes.
Developers and beta testers can update to beta 2 in the Mac App Store > Updates > Software updates > OS X 10.10.4 seed 2. If you don’t have it yet you can download it for the first time from the Mac Developer Center.