On Thursday, Apple has seeded the first beta of a new OS X Yosemite update to developers for testing. This update, dubbed OS X Yosemite 10.10.4 is available on Apple's Web site via the developer portal.

The update appears to be a very minor one that focuses on improvements to security and stability. No major new features have been announced as of this writing.

It isn't a public beta, so only Apple developers have access to the software at this point in time.

Notably, the OS X Yosemite 10.10.3 update was just released to the public about a week ago with an all-new Photos application for OS X, new Emojis, and Google account sign-in improvements. Moreover, a supplemental update was released just today with video driver improvements.