Developers will receive a pre-release build of OS X 10.7.4 before the end of the week, it has been claimed.
Apple Insider reports that Apple is preparing the first external betas of OS X 10.7.4 to a limited number of developers, though a wider release to all members of the Apple Developer Connection could happen by Friday.
Though it is expected to bring a number of enhancements and fixes to OS X Lion, it isn't known exactly what OS X 10.7.4 will bring, or when the official update will go live - normally there are several beta versions before the full version is released.
OS X 10.7.3 was released in early February, addressing stability, compatibility, and security issues.
Apple has already stated its intention to release the next iteration of OS X - Mountain Lion - over the summer, at around the same time as Microsoft will be launching Windows 8.