Hot on the heels of today's release of the fifth developer betas of iOS 10, macOS 10.12 Sierra, watchOS 3 and tvOS 10, Apple has now made two further pre-release versions available.
Public Beta 4 of iOS 10 and macOS Sierra are now available to download. Those rollouts come exactly one week after the third public betas of both operating systems were released.
At this late stage in the development of each OS version, Apple is now focused on refining the user experience, and squashing any remaining bugs that it can find. These latest betas are therefore likely to be virtually identical to the last ones, but with a bit more polish.
For those not on Apple's Public Beta Program, the company released a further update for its i-devices last week. iOS 9.3.4 includes an "important security update", which aims to prevent applications from "being able to execute arbitrary code with kernel privileges".