Apple is now on its sixth round of betas for its milestone operating system releases, providing developers with new builds of iOS 14, iPadOS 14, watchOS 7, and tvOS 14 for testing.
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.
At the time of publication, macOS Big Sur's beta has yet to be released, but is expected soon.
The Home screen and app interface for iOS 14 and iPadOS 14 have seen major alterations, along with changes to Messages and Safari, Siri's interface, and Maps. The operating system also gains Sound Recognition alerts and CarKey, among other features.
Both AppleInsider and Apple strongly suggest users avoid installing betas on to "mission-critical" or primary devices, due to the potential for data loss or other issues. Instead, the recommendation is to install betas onto secondary or non-essential devices, and to ensure there are sufficient backups of important data before making any major changes.
Update: Apple has also released public beta versions of iOS 14 and iPadOS 14 for testing.