I cannot get videos on to my Sony Walkman even though I have the software to make them into the Sony supported formats, which are: MPEG-4, AVC and WMV. I used to run Windows on my Mac and there was a CD-Rom supplied with my Walkman that enabled WMV files and I did get some videos on to my Walkman then, but my Mac crashed and after reinstalling it I no longer had my Windows and would rather not put it back on. Any help out there please? Surely a Sony Walkman should be compatible with Mac as well as Windows.