4Videosoft Mac iRiver Video Converter 3.1.06 - 4Videosoft iRiver Video Converter for Mac is specially designed Mac iRiver Video Converter. It can convert video to iRiver compatible video/audio formats on Mac OS, like convert video to iRiver WMV, iRiver AVI, iRiver MP4, iRiver H.264/MPEG-4 (.mp4).