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Apple Seeds iOS 11.4 Beta 4 to Developers and Public Beta Testers

Apple Seeds iOS 11.4 Beta 4 to Developers and Public Beta Testers

Apple today seeded the fourth beta of their iOS 11.4 update to developers and public beta testers. The fourth beta of Apple’s upcoming mobile device operating system comes one week following the release of the third beta.

The fourth iOS 11.4 beta is build number 15F5071a.

Registered developers can download iOS 11.4 beta 4 from the Apple Developer Center, or over-the-air directly to iOS devices that has the proper configuration profile installed. Registered public beta test members can also up date their iOS device over-the-air.

New in iOS 11.4

Messages in iCloud

iOS 11.4 beta includes Messages in iCloud for testing and evaluation purposes. Messages will prompt users to turn on Messages in iCloud on first launch after upgrading to iOS 11.4 beta. Please note that Messages in iCloud is automatically enabled for users who have two-factor authentication and iCloud Backup enabled.

Notes and Known Issues


Known Issues

  • Clients of NSURLSessionStreamTask that use a non-secure connection fail to connect when an error occurs during PAC file evaluation and the system is configured for either Web Proxy Auto Discovery (WPAD) or Proxy Automatic Configuration (PAC). A PAC evaluation failure can occur when the PAC file contains invalid JavaScript or the HTTP host serving the PAC file is unreachable. (33609198)Workaround: Use startSecureConnection to establish a secure connection.


Known Issues

  • Facial landmarks identified by the Vision framework may flicker in temporal use cases such as video. (32406440)


Known Issues

  • Debugging a disabled Messages extension may cause Messages to crash. (33657938)Workaround: Before starting the debug session, enable the extension by tapping the More button to show the list of apps, then tapping the Edit button, and then tapping the switch to turn on the extension.
  • After a simulated iOS device starts up, it’s not possible to pull down the Lock screen. (33274699)Workaround: Lock and unlock the simulated device and then reopen Home screen.