Mac OS X: how to create ISO disc image can be read on Windows or Linux

1. Open "Disk Utility", "File" -> "New" -> "Blank Disk Image..."
   
   
2. Add the files or directories to the image.
3. The image is in HFS+ format, which is not readable on Windows or Linux. To make it readable on all the platforms, we need to convert the image to joliet format. To do that
   
   1. Unmount the image first
   2. Locate the image in "Terminal", and run the following command to convert it (assume the image file named Test.cdr) to a joliet .iso file:

      hdiutil makehybrid -iso -joliet -o Test.iso /path/to/Test.cdr