I have been trying to be a good user and share some of my music. All of my personal music has been imported to my 10.3 OS Mac. in ACC format, which is supposed to be better than MP3 with the same amount of compression. This is for use in my IPOD. I've noticed that no-one seems to down load the M4A files (ACC) yet they will download the MP3 files I have gotten from the site. Is this from lack of knowledge or do ACC (M4A) files not work on any other platform but IPOD?