Apple issues fourth public betas of iOS 11, tvOS 11, & macOS High Sierra

The iOS 11 update should be an over-the-air download for users of the third public beta, or available fresh by enrolling in Apple's Beta Software Program. As with the fifth developer seed, the "Messages in iCloud" feature — which syncs conversations between devices — should be missing, though Apple has promised to restore it in a later update.

The latest tvOS 11 and High Sierra betas contain just minor changes, suggesting that Apple is largely concentrating on bugfixes at this stage. To download the tvOS update, Apple TV owners must not only be in the Beta Software Program, but go into the tvOS Settings app and toggle "Get Public Beta Updates" under the System menu's Software Updates section.

Apple is due to release the finished versions of iOS 11 and tvOS 11 sometime this fall, but most likely in September ahead of the "iPhone 8" and a fifth-generation Apple TV. High Sierra could arrive in September or October, going by past macOS launches.

iOS 11 includes features like a Files app, augmented reality support, a new Control Center, and a radically redesigned iPad interface. tvOS 11 makes less dramatic changes, but includes things like notification support, automatic light/dark mode switching, and homescreen sync for houses with multiple Apple TVs. macOS High Sierra incorporates the Apple File System and new graphics technologies, among other improvements.