How to Backup iTunes from Your Mac to Another One
It is an expensive work to download and purchase your favorite movies and songs to your computer. What if you've changed a computer? That means you need to backup iTunes library (iTunes music and videos) from one Mac to another Mac. Actually, it's just a piece of cake, and there is the way for you to reach it.
If you want to transfer all your videos and music got from iTunes store and other resources, you need third-party software - Free iTunes Transfer for Mac.
Download the Free Mac iTunes Transfer. At first, connect iPod (or iPhone, iPad) with your old Mac and launch iTunes. Sync your iTunes Library to iPod. Then you can do as the following step-to-step tutorial.
Download Free iTunes Transfer for Mac
How to transfer iTunes from one Mac to another Mac step by step
Step 1: Connect your iPod, iPad, iPhone to your Mac
After download the program, install and launch it. Then connect your iPod, iPad, iPhone to Mac. The main interface of the free iTunes transfer is as below:

Step 2: Backup iTunes music & videos
After connecting your iDevice to Mac, all videos and music are displayed on the left of the main interface and sorted clearly in different catalogs. Choose your desired folder. Then just drag music/videos from the left to the right of the interface - to your location.

Tips:
1. Free iTunes Transfer for Mac also supports batch transfer, to copy a list of files at one time with high quality.
2. It also provides Preview function. Double click the media file, you can preview it in the program and decide whether to transfer it. And the capacity of your device is listed at the left button for you to conduct your transfer more conveniently.

If you want to transfer media files like videos, photos, or DVD movies for playback on your iPod/iPhone/iPad, you can click More Contents under the Music, which allows you to transfer those files within 20 files. But if you want to transfer more, you can try the full version of TransPod for Mac, which allows you to backup and share all kinds of media files even including TV shows, books, podcasts, iTunes U, playlists, etc. between your devices, with no limitation.
