updated 07:54 pm EDT, Wed June 11, 2014
New betas expand areas for developers to test; OS X Server also updated
Two weeks after its initial OS X 10.9.4 Mavericks beta, Apple has sent out a second one for both the client and OS X Server versions. The latest Mavericks developer build, 13E16, expands areas of interest for developer testing beyond the usual graphics drivers and Safari to include Bluetooth, audio drivers, the App Store and Finder. A Safari 6.1.5 beta for older systems was also issued, with requests for testers to focus on general website and extension compatibility.
The new 10.9.4 beta is available both to registered developers and members of the public Beta Seed Program. The previous build's code was discovered to hold clues suggesting that a revamped iMac may be on the way, with references to "iMac15,1" and "iMac15,n" embedded in the code. Current iMac models carry "14,1," "14,2" and "14,3" identifiers. Code found in the Yosemite beta may hint that the next iMac models, or one of them at least, could feature a Retina-quality display.
The 10.9.4 update could be the last for Mavericks, as OS X 10.10 Yosemite is expected to be released this fall. Developers and testers can download the new builds from Apple's developer portal or through Software Update for qualified testers.