Just add the songs from the older iTunes library to the new library. In the Mac OS X version of iTunes, select File > Add to Library, and navigate to your Mac OS 9.2 iTunes Music folder. Click Choose, and iTunes adds all your music. This adds all the songs to the new library, but it won’t carry over play counts or playlists.
How do I transfer songs from my Mac OS 9 iTunes to Mac OS X on the same machine?
Jeremy Horwitz was the Editor-in-Chief at iLounge. He has written over 5,000 articles and reviews for the website and is one of the most respected members of the Apple media. Horwitz has been following Apple since the release of the original iPod in 2001. He was one of the first reviewers to receive a pre-release unit of the device, and his review helped put iLounge on the map as a go-to source for Apple news.