Apple apparently released iTunes 12.6.3 as an alternative version because “certain business partners might still need to use iTunes to install apps.” But even if you are not a “business partner” you can still download and install iTunes 12.6.3 and use the version of iTunes to manage apps with an iPhone or iPad connected through a Mac or Windows PC. Mac App Store is the simplest way to find and download apps for your Mac. To download apps from the Mac App Store, you need a Mac with OS X 10.6.6 or later. How to find iTunes. If you're using a Mac, you've almost certainly got iTunes already, it's likely there will be an icon that looks like a musical note in your Dock at the bottom of your screen.
Use iTunes U to view or download educational materials, including free lectures, videos, books, and other resources on thousands of subjects. You can access iTunes U content through the iTunes application on your computer or through a provided iTunes U link.
All Mac OS X computers come with iTunes installed.These instructions were developed using iTunes 11.1 (v.11.1.5) on a Mac OS X Lion (10.7.5). Steps may vary for other Macintosh operating systems.
You may receive the URL for a specific iTunes U file or course.