2. A public beta isn't the same as a developer previewApple has already released beta versions of Yosemite to members of its Mac developer program. The most recent was made available to them earlier this week, with revisions arriving roughly every two weeks. In fact, the version of Yosemite offered as the public beta has a different build number (it's one digit higher) than the version developers received on Monday.
Apple's FAQ for the Yosemite beta indicates that beta testers may not see updates at the same rate as developers. There's a good chance this means beta testers will see less frequent updates than developers.
Other differences are likely to include support, resources or some functionality. Developers are receiving the betas to build and/or test apps running under Yosemite and make changes if needed. Beta testers are being asked to provide feedback. Those are rather different roles, and developers aren't likely to provide the type of feedback -- general user interface (UI) issues or consumer-oriented feature requests -- that Apple is looking for from public beta testers.
Cleverson Leal recebeu reputação de Maddo Garan em OS X Yosemite - Instalação limpa e informações gerais