I just tested this download on my Mac. Using uvsdecoder to decode the .uvs, and mac Converter to rejoin the .cr2 and .rsr... it works! Nice job. As for Lemurtek's comment about the "extra binary stuff", there is a setting in Mac Converter to "Delete Mac Resourceforks". You should always have this setting turned on. mac users can always recreate the thumbnail from the .rsr. -Adam