Apple’s OS X 10.9.3 might be available in public beta only, but the Cupertino, Calif. company is already internally testing a subsequent update to its Mavericks desktop operating system. Codenamed “Epic,” the update is set to bring “bug fixes and various stability enhancements” to Mac computers, according to a recent report.

The news comes from 9to5mac, which explains:

Development of 10.9.4 is still in its early stages with Apple telling employees that this build is an “alpha.” When 10.9.4 hits “beta” status, developers and AppleSeed testers will likely be able to get their hands on the upcoming operating system update.

Apple started allowing members of the public to test its OS X prerelease software last month with the launch of its OS X Beta Seed Program.

After signing an agreement, members of the program can download and install OS X beta software free of charge via the Mac App Store; OS X 10.9.3 beta, which brings “true” Retina support for OS X-powered 4K monitors, is presently available to download through the program.

As 9to5mac rightly adds, “The internal seeding of 10.9.4 also indicates that the public release of OS X 10.9.3 is quickly approaching.”

On the other hand, no prospective release date for OS X 10.9.4 has been hinted at either, though with a redesigned OS X 10.10 update expected to ship later this year it seems likely we’ll see a summer release for the bug-fixing minor update. We’ll keep you updated on this front.

In the meantime, see: Mingle: Action-Based Contacts Could Be The Best, Fastest Contacts App, Today’s Apps Gone Free: Tofu Go, Beat Drift, WakeApp Weather And More, and Jury Finds Samsung Guilty Of Infringing Apple’s Patents, Awards $119.6 Million.