Unable to download sounds for Logic Pro X and GarageBand on iMac with OSX El Capitan

Since the machine (iMac 24-inch Early 2009) works regularly, I thought about reinstalling Garage Band and Logic Pro X (regularly purchased in 2013). However, neither Logic nor Garage Band nor MainStage are able to download the sounds from the library.

Perhaps Apple has closed access to the sound library for older versions of the applications? It doesn't seem very fair to me

[Re-Titled by Moderator]