Installing Prereleases on a Device

Install a prerelease on a device connected to your Mac if you want to prepare for new features.

To install a prerelease on your development device
  1. Launch iTunes on your Mac.

  2. For iOS and tvOS apps, connect a device to your Mac. For watchOS apps, connect an iPhone paired to an Apple Watch.

  3. In the upper-left corner, select the device.

  4. To upgrade to the latest operating system version, click the Restore button.

  5. To install a prerelease, Option-click the Restore button, select the beta software restore image, and click Open.

    The software restore image file has a .ipsw extension.

  6. When installation is complete, activate the device and use iTunes to restore its contents.