.. before I throw the flipping machine out of the window Just to clarify that I do have an SD card (rather than SDHC) and my RNS-E unit does recognise the card. It does not however play anything I export to the SD card. I-tunes doesn't recognise the card reader device in the same manner that it would an ipod so I have been trying to export playlists to the card. The format options that I have are 'plain text, unicode text, xml, M3U and M3U8 none of which seem to work. Any help would be appreciated. Hopefully someone with a macbook has had this problem?