Today Apple has released the first public beta builds for iOS 13, iPadOS, and macOS Catalina. All three new iterations of its operating systems were announced at the company's annual developer conference earlier this month. In the meantime we've seen a few developer previews, but now Apple has decided the upcoming releases are good enough to undergo testing out in the open by anyone who has the guts to sign up for its beta program. To sign up, go to this website. You'll then keep receiving follow-up beta builds all the way to the release of the finalized versions of the operating systems,...