Apple has released the first OS X 10.8.4 beta to developers.
The beta, which was issued to AppleSeed members on Monday, arrives just over two weeks after Apple released OS X 10.8.3 to Mac users.
Apple asked testers to focus on WiFi, Graphics Drivers and Safari, but the build, which comes in at number 12E27, doesn't appear to have any changes in these areas, indicating that the beta contains bug fixes and performance improvements rather than major changes in this iteration.
Apple's OS X 10.8.3 update, which saw 14 betas seeded to developers before being released to the public, includes Safari 6.0.3, Boot Camp improvements and audio fixes.
With the release of OS X Mountain Lion more than a year ago, many are wondering when the company will unveil Apple's next OS X, rumoured to be called OS X 'Lynx'.
This year, data analytics logs have seen increasing traffic from computers running what's believed to be Mac OS X 10.9, suggesting that the new operating system is currently being tested at Apple. SEE: Mac OS X 10.9 release date, rumours and leaked images