April 9, 2019: Apple releases watchOS 5.2.1 beta 2 for developers. Apple has just released watchOS 5.2.1 beta 2 version for developers. If you already have a previous watchOS 5 beta installed, proceed to the Watch app on your iPhone running the beta of iOS 12.2 and download away.. Apple has released new beta software for developers. In addition to iOS 12 beta 2, the company has launched tvOS 12 beta 2, macOS Mojave beta 2, and watchOS 5 beta 2.. The watchOS 5.2 SDK provides support for developing watchOS apps for Apple Watch devices running watchOS 5.2.1. The SDK comes bundled with Xcode 10.2 available from the Mac App Store.. Apple today seeded the second beta of an upcoming watchOS 5.2.1 update to developers, a week and a half after seeding the first beta and almost two weeks after the release of the watchOS 5.2 . . .