Compiling STk for OS X
  ----------------------
 
  ./brg/build /Applications/STk
 
  # *** Be sure to change the version dependent info below ***
 
  # create a 20MB disk image
  
  hdiutil create -megabytes 20 STkMacOSX.dmg -fs HFS+ -volname STk4.0.1-ucb1.13
 
  # Mount the disk image (double click on the dmg file)
 
  # Copy the files to it, including the help file
 
  # Eject the disk image (drag the opened disk to the wastebasket)
 
  # compress it and make it read only
  
   hdiutil convert -format UDZO myimage.dmg -o mycompimage.dmg