iOS 5.1 beta now available for developers (Updated)

Apple released iOS 5.1 beta to developers this afternoon. The changelog suggests this is a minor update that fixes a few small issues affecting Newsstand, Music Player and Game Center. There’s also a handful of changes in the APIs and iCloud storage for developers to note.

A report earlier this month from Macerkopf claimed an upcoming version of iOS 5, possibly 5.1, would add even more commands to Siri,  including the ability to turn WiFi on/off and launch the camera. As it looks now, this 5.1 version does not contain these changes. You can read the release notes below, and we will keep you updated if anything interesting in iOS 5.1 is uncovered.

Update: 9to5Mac discovered a reference to a new tablet device in the iOS 5.1 source code. The iPad 2,4 is thought to be a reference to a Sprint version of the iPad 2 or possibly some other unknown iPad that uses the CDMA/GSM chip found in the iPhone 4S.

iOS 5.1 beta release notes


iOS SDK 5.1 provides support for developing iOS applications and includes the complete set of Xcode tools, compilers, and frameworks for creating applications for iOS and Mac OS X. These tools include the Xcode IDE and the Instruments analysis tool among many others.

With this software you can develop applications that run on iPhone, iPad, or iPod touch running iOS 5.1. You can also test your applications using the included iOS Simulator, which supports iOS 5.1. There are two Xcode iOS SDK 5.1 images, one for installing on a Macintosh computer running Mac OS X 10.6.7 (Snow Leopard) or later, the other for installing on a Macintosh computer running Mac OS X 10.7 (Lion).

This version of iOS is intended only for installation on devices registered with Apple’s developer program. Attempting to install this version of iOS in an unauthorized manner could put your device in an unusable state.

For more information and additional support resources, visit:

Bug Reporting

Please report any bugs not mentioned in the ìIntroductionî section using the Apple Bug Reporter on the Apple Developer website ( Additionally, you may discuss these issues and iOS SDK 5 in the Apple Developer Forums: You can also access more information about iCloud for Developers at:

Notes and Known Issues

The following issues relate to using the 5.1 SDK to develop code.



When creating an iCloud account, you can use any Apple ID as long as it is a full email address and not a MobileMe account. If you have a MobileMe account, you can move that account to iCloud. You can find more information at:



  • The NSNetService class and CFNetService APIs do not include P2P interfaces by default. To browse, register, or resolve services over P2P interfaces, an application needs to use the Bonjour DNSService*() APIs noted below.
  • Setting the interfaceIndex parameter to kDNSServiceInterfaceIndexAny in the following API’s will not include P2P interfaces by default. To include P2P interfaces, you must now set the kDNSServiceFlagsIncludeP2P flag when usingkDNSServiceInterfaceIndexAny or set the interfaceIndex to kDNSServiceInterfaceIndexP2P. The affected APIs are:
    • DNSServiceBrowse
    • DNSServiceRegister
    • DNSServiceResolve
    • DNSServiceRegisterRecord
    • DNSServiceQueryRecord



App Icons and Profile Photos are not loading in apps using Game Center.


iCloud Storage

  • Provisioning profiles must be enabled for iCloud in the iOS Provisioning Portal. You can enable a provisioning profile for iCloud by navigating to the App ID section of the iOS Provisioning Portal and configuring your App ID for iCloud. After enabling the App ID for iCloud, regenerate your provisioning profiles to enable them for iCloud.
  • The setSortDescriptors: method of NSMetadataQuery is not supported.
  • In iOS 5, files that are protected via Data Protection cannot be used with iCloud Storage APIs.
  • File names are case-insensitive in Mac OS X but case-sensitive in iOS. This can lead to problems when sharing files between the two using iCloud. You should take steps on iOS to avoid creating files whose names differ only by case.

Movie Player: Starting in iOS 5.0, in order to facilitate finer-grained playback control, a movie player is not automatically prepared to play upon creation. Call the prepareToPlay method to prepare the movie player. For more information, see MPMoviePlayerController Class Reference

Music Player: Using shake-to-shuffle causes Music app to freeze and playback to stop.

NewsstandFIXED: Deleting an issue that was marked as the currently reading issue could cause a crash

Security: In iOS 5, the signing of certificates with MD5 signatures is not supported. Please ensure that certificates use signature algorithms based on SHA1 or SHA2.

Xcode/Developer Tools

  • A bug in the documentation organizer causes an exception when you type in any field in the content area. To prevent the need to log in to the developer website from Xcode, download documentation sets locally using Xcode’s documentation preference pane and enable the ‘Check for and install updates automatically’ checkbox as a workaround.
  • “uninstall-devtools” script mistakenly removes files and packages even if Xcode is still running. Be sure to quit any running copy of Xcode before starting the “uninstall-devtools” script.
  • The Network Link Conditioner daemon cannot be launched after installing the Networking Link Conditioner without a reboot. You can manually workaround the issue with a restart or by the following command: sudo launchctl load /system/library/launchdaemons/]
  • In the iOS 5 development tools, it is possible to extract APIs used by an application and have them checked for use of private APIs. This option is offered when you validate your application for app submission.
  • Jacob McGrath

    When you enrolled in the Apple Developer Program, you agreed to an NDA agreement. Section six of the NDA reads “This Agreement does not grant you any right or license to incorporate or make use of any Apple intellectual property (including for example and without limitation, trade secrets, patents, copyrights, trademarks and industrial 
    designs). By publishing the release notes you are in direct violation of section six and face termination of your Apple Developer Program. Please remove the release notes in this article, before legal action is take against you by Apple, Inc.

    • Anonymous

      Release notes are made publicly by many tech blogs and users. Apple has never taken legal action against any one of them. Publishing the notes does not violate the agreement as although it is a intellectual property of Apple, Apple and the developers have the right to disclose what the beta holds and notes to consider since we all work together for our own applications and to report bugs found in the software.

    • S2

      You are such a wanker hahaha

Back to top ▴