It's exclusive to the GarageBand application for Macs. Any Mac shipped in the last 18 months or so came with a copy. Check the link for what all it can do, it's a music mixing and creation application. I suppose if you just wanted an AAC or MP3 file, a friendly Mac user could make you one. :)
(Technically, since it's actually in Apple Loops format in the tracks, Logic Pro and a number of other third party apps will read it as well, but all Macs now come with GarageBand.)
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Date: 2005-04-16 05:00 pm (UTC)(Technically, since it's actually in Apple Loops format in the tracks, Logic Pro and a number of other third party apps will read it as well, but all Macs now come with GarageBand.)