I produce Cds for our Society and recently received this message. 'I was very surprised to find that the CD I got from you is for Windows PCs only - no Macs, no Linux. Again, no other FHS has sent one with a restricted format: it's so simple to add the basic files needed for cross-platform support.' The Cds are ISO 9660 and autostart. The data files are all pdf format which I know is OK on a Mac because I have tried them. Anyone know what other 'basic files' are needed for Mac and Linux systems please? Peter