On April 16, Apple seeded the first beta for OS X 10.10.4 Yosemite, to registered developers.
The second beta for OS X 10.10.4 Yosemite plants the build number at 14E11f, and it’s available either via Apple’s developer portal or through the Mac App Store on machines running the first beta. The update measures in at 941MB, and Apple has continued to focus the new software on “stability, compatibility, and security.”
The update is available now.[via Apple]