iTunes 4 features superior sound quality including support for MPEG-4 AAC audio. iTunes 4.0.1 includes a number of performance and network access enhancements, and only allows music sharing between computers using iTunes 4.0.1 or later on a local network (in the same subnet). If you have an Apple SuperDrive, you can archive your song files to a DVD disc as well as burn playlists to standard audio CDs to play in your car or home stereo.
What’s new in 4.0.1
- Buy music from the online Music Store and download individual songs or entire albums directly to your music library. (The Music Store is not available in all countries. For more information, visit www.apple.com/itunes.)
- Share your music library or playlists between your computers. (Requires Mac OS X version 10.2.4 or later.)
- Listen to MPEG-4 Advanced Audio Coding (AAC) files, a new compression format with quality that rivals audio CDs. If you have QuickTime 6.2 installed, you can also encode music using the AAC format.
- Back up your music to a DVD. If your computer has an internal SuperDrive and Mac OS X version 10.2.4 (or later), you can back up your music library by adding the songs to a playlist and burning the playlist to a DVD.
- View or add artwork to the songs in your music collection.
System Requirements: iTunes 4 requires Mac OS X version 10.1.5 or later (Mac OS X 10.2.4 is recommended). Music sharing and DVD burning require Mac OS X version 10.2.4 or later, and AAC encoding requires QuickTime 6.2 or later. 256 MB RAM is recommended.