How to Transfer iTunes Library to another Computer?

Here we are given the way to transfer iTunes library to another computer:

• Step 1:
  Plug your external hard drive or USB stick in the new computer.
• Step 2:
  Double click it to open and see what is inside. If the steps above were completed correctly, you should obviously see your iTunes folder.
• Step 3:
  Launch a new finder window and find the Music folder of your new computer.
• Step 4:
  From the external drive or USB dongle, drag and drop the iTunes folder inside the Music folder of the new computer. Items will be copying over, which again could take a while depending on the size of your library.
• Done! You can now launch iTunes and all your music, including all songs, albums, album arts, as well as playlists should be in there.

Note that if you migrated songs that were purchased via iTunes, you will have to authorize the new computer to play these songs. To do so, go to Store > Authorize This Computer in iTunes and enter your iTunes username and password.