iTunes doesn’t work after upgrading to macOS Sierra If you have upgraded to macOS Sierra and your iTunes isn’t working it is most likely because you are running an older version of iTunes. Before upgrading to the latest Mac operating system it is good

If you're using an earlier macOS, such as macOS High Sierra, Sierra, El Capitan, or earlier,* follow these steps to keep it up to date: Open the App Store app on your Mac. Click Updates in the App Store toolbar. Use the Update buttons to download and

Sometimes Apple releases updates for iTunes through the Mac App Store, so if an update doesn't show up in iTunes, try the Mac App Store. How to use the Mac App Store to check for iTunes updates. Make sure that you've quit iTunes. Open the Mac App