Dec 04, 2012 The 'library' is the whole iTunes folder. Delete or rename the existing one, then paste in the entire iTunes folder from the other computer. The most important file is iTunes Library.itl, but all the other bits you mentioned are part of the library, along with the contents of the iTunes Media (or iTunes Music.
Itunes
Upgrade your iTunes library in macOS Catalina
How To Move Itunes Library On Mac
When you open the Apple Music app or Apple TV app for the first time in macOS Catalina, your iTunes library is upgraded so you can use it with the new apps. If you have multiple iTunes libraries, you need to upgrade each library before you can use and switch between them in macOS Catalina.
Switch to another iTunes library
My Itunes Library
- Hold down the Option key, then open the Music app or Apple TV app.
- In the window that appears, click Choose Library.
- Select a library, then click Choose.
How To Replace Itunes Library With Another Mac Pro
Learn more about what happens when you upgrade another iTunes library.