A free public beta version of Mac OS X Yosemite is now available for download via an official AppleSeed sign up page.

OS X Yosemite is Apple’s upcoming Mac OS update. It was revealed yesterday during the company’s WWDC keynote. During the unveiling, Apple’s senior vice president of Software Engineering, Craig Federighi, announced that an OS X Yosemite beta program would become available prior to the operating system’s scheduled Fall release.

The beta download is only available to the first one million users who sign up. To qualify, users must possess an Apple ID, as well as machine already running Mac OS X Mavericks.

OS X Yosemite features an all new interface design, in addition to various system and program updates. These updates are highlighted on Apple’s website, as well as in my article on the new look of Mac OS.

Since the beta became available, users of the pre-released OS have encountered several bugs, some of which have rendered their hardware unusable. The beta version of OS X Yosemite is still quite unstable, and is only recommended for users with secondary computers. Once the OS has been installed, users cannot revert back to a previous version of Mac OS without restoring from a Time Machine backup, or otherwise reinstalling their operating system completely.

If you have further questions about OS X Yosemite or the beta program, or if you have feedback on the beta program, please use the comments box below.