This is an interesting question, since it would mean that you have a .wav or .aiff (or whatever Mac's uncompressed sound format...I forget) that is greater than 650-700 megabytes, or more than 80 minutes. I would imagine that this would be something like a concert, or perhaps a speech by some congressman. Alternatively, it could also mean that you might have a song or concert of speech that was longer than the 12 hours or so that a 128kbps mp3 would be able to present on one 650 megabyte CD disc. This would be an unusual thing indeed, perhaps consisting of audio of say, the Nixon tapes (with "The missing tapes") or something of that nature. This would be quite unusual indeed, but not outside of the realm of possibility.
Anyway from a technical standpoint, and not one that is necessarily a pure Mac solution would be to use the free program
Audacity to break this large file up into CD burnable sized ones. This program allows you to copy/cut paste sound much like Garageband, with the caveat that I haven't bothered to learn how to use garageband since I know how to use Audacity. It's very good for say, taking something that was recorded from ...oh, I don't know, the radio or something like that and busting up the long recording into individual songs. Then saving it to the digital music format of your choice. This program is, of course, available for MacOS X.
Keep in mind that the knowledge of being able to use this program, and possibly the program itself might be illegal as far as the Recording Industry Association of America is concerned, since they don't think it is possible to record anything that you can hear. They also think that it is possible to make it impossible to record anything that you can hear. However keep in mind that just because the Recording Industry Association of America thinks something is illegal, it does not necessarily make it so since they are not a legislative or judicial branch of any country's government. They merely think they can convince you that they are.