Today Apple launched the OS X Beta Seed Program which allows users to test pre-release versions of the MAc operating system. Starting from OS X 10.9.3, users can try pre-release operating system updates , a feature which hasn’t been available unless you are a developer.
So you won’t need to pay $99 per year as a developer to test pre-release software but you are still required to sign an agreement to keep some details secret.
Well if you are so eager to experience the latest or future release accompained by a few bugs please sign up through the source link.