Builds of each operating system can be downloaded from the Apple Developer Center by those taking part in the testing program, along with the option to perform an over-the-air software update for devices already enrolled into the scheme. A public beta is typically made available shortly after the developer version is distributed, via the Apple Beta Software Program website.
The new builds take over from the first set, which for iOS 13.4.5, iPadOS 13.4.5, and tvOS 13.4.5 were issued on March 31. The first watchOS 6.2.5 build came out one day later on April 1.
