KennyT, you are looking for a file format converter utility. There are dozens out there for the PC (I use Poikosoft myself), but since you are on a Mac I suggest you look through the apple download store.
I found this, but it doesn't say it supports apple lossless (which is odd for an apple application):
http://www.apple.com/downloads/macosx/audio/switchfileformatconverterformac.html
Good luck.
I found this, but it doesn't say it supports apple lossless (which is odd for an apple application):
http://www.apple.com/downloads/macosx/audio/switchfileformatconverterformac.html
Good luck.