Developers now have the OS X Yosemite 10.10.4 third beta available for download from the Mac developer Center. After releasing the second beta version last 28 April now comes the third beta version for developers to install and test this version.
This is build 14E17e and in principle it corrects some problems, bugs and bugs of the previous version, but not much more is specified about the improvements that are added in this beta 3 since they seem focused on the stability and security of the version. The new beta comes hand in hand with the next beta of iOS 8.4 that is also improving the stability and possibly the Music application.
This new beta of OS X launches when just under a month to WWDC of this year 2015 and it is possible that it is the last or penultimate revision of OS X 10.10 before releasing the final version and then making the jump to OS X 10.11. All this is now a bit far, so we are going to see Apple's movements in this regard and we believe that we will soon have the public beta version of OS X 10.10.4.