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iTunes - Upgrading to a New Version
Use the directions below to upgrade your version of iTunes on Mac and/or Windows.
The latest version of iTunes can be automatically downloaded and installed by using Software Update in the System Preferences of OS X. Click on the Apple in the upper-left hand corner, and then click Software Update... The system will check for new software, and will list all updates on your screen. Updates for iTunes will be included on this list.
iTunes will check for updates every time it launches, provided you are connected to the internet. If updates are available, you will receive a prompt to download the updated version. You can also manually check for updates by clicking on Help -> Check for Updates. If you have any problems updating, use the link below to troubleshoot your problems.
- iTunes for Windows doesn't open after upgrading: http://support.apple.com/kb/TS2363