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How to upgrade to iOS 9 (and, if you need to, reinstall iOS 8)

Roman Loyola | Sept. 17, 2015
Ready for the new version of iOS? Here's how to install it on your iPad, iPhone, and iPod touch. And just in case, we also tell you how to revert back to iOS 8.

 

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  • A screen appears, telling you that iOS 9 is available to install. Tap the Install button. The download and installation will take a few minutes.
  • Install iOS 9 though iTunes on your Mac

    1. Connect your iOS device to your Mac using the sync cable and then launch iTunes.
    2. If iTunes already knows that the update is available, an alert will pop up, asking if you want to update your device. Click the Update button to install iOS 9.

    If you don’t see an alert, click on the device icon in the upper left and then click on the Summary tab in the left column. In the right window, click on the Check for Update button. If it’s available, the version of iOS 9 for your device will download to your computer for installation.

    Perform a fresh install of iOS 9

    A new iOS can also mean a fresh new start. Maybe you’ve installed too many apps on your iOS device, and you want to use this opportunity to start from scratch and install only the apps you really want. Whatever the reason, you can wipe out your device and then install iOS 9.

    This is done by restoring your iOS device using iTunes. It takes more time than just upgrading the already-installed operating system, and that doesn’t include the time it takes to reinstall your apps. Here’s how to restore and then install iOS 9 on your device.

    1. Connect your iOS device to your Mac using the sync cable and then launch iTunes.
    2. Click on the device icon in the upper left and then click on the Summary tab in the left column.
    3. In the right window, click on the Restore iPhone button. You’ll be asked if you want to back up your device; if you haven’t backed up in a while, it’s a good idea to do so. Be sure to confirm that you want purchases made on your device copied over to your Mac.
    4. A confirmation dialog appears. If you’re sure you want to restore, click the Restore button.
    5. iTunes will restore your device using iOS 9. This will take a while.
    6. When the process is done, iTunes will ask if you want to set up as a new device, or restore from a backup.

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    If you restore as a new device, you’ll have to enter settings for Wi-Fi, your Apple ID, Siri, and more. You can then use iTunes to determine what apps to install on your device.

    If you want to restore from a backup, you’ll be asked to select a backup file that iTunes will use to restore your device.

     

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