All of these recommendations seem over the top for such a small app, but i Tunes is not the simple 18 MB installer of 2003.
It has become a huge albatross over the years; turning into an app that does many things but none very well.
We’ve also covered alternatives to i Tunes in our article here.
In fact, it won the Groovy Post award for worst software ever.
That was a few years ago, and unfortunately, not much has changed with the most recent versions, which at the time of this writing is i Tunes 12.
That said, a lot of users, including myself, still use it.
Fire up Script Editor (which is under Applications/Apple Script, but it will work with Text Edit).
Paste the following code, then save as a Script called /Library/i Tunes/Scripts/(create the Scripts directory if it doesn't already exist).
Installing an older version might be your only option. If you continue to experience problems with that version of i Tunes, download the latest i Tunes setup here then attempt installation again.