Apple has released the fourth developer betas (and final release candidates) of iOS 14.6, iPadOS 14.6, tvOS 14.6, watch OS 7.5, and macOS Big Sur 11.4. A release candidate (RC), also known as “going silver”, is a beta version with potential to be a stable product, which is ready to release unless significant bugs emerge.
Registered developers an download the betas via Apple’s developer portal. Or it can be downloaded over-the-air once the proper configuration profile has been installed from the Developer Center.