The problem is that if your iPod is Mac formatted, then you can’t access your iPod on a PC without having to reformat your iPod first.
And this causes a serious problem for us the customers of Mac or PCs and iPods. Do you still remember those great “Hi, I’m a Mac and I’m a PC” commercials? Or the famous Steve Job’s Stanford commencement speech quoting how Windows just copied everything Mac did? Well, one thing we know for certain is that Mac and PC are competitors and do not get along very well.