Over the years Apple has released public beta tests of individual Mac apps, however its OS X operating system has always been off limits unless you are registered as a developer.
Well this has changed since Apple launched the OS X Beta Seed Program. Starting with the OS X 10.9.3, you can experience the pre-release operating system updates by signing in with your Apple ID, however you will still have to sign a developer-style agreement promising to keep some details a secret.
There’s already updates available for you to test out, if you can live with the bugs that comes with a beta version of the operating system. If willing to experience the updates with all its flaws, then you can sign up now to get on with the OS X Maverick Beta.