 You need to unzip the mmide.zip file
  that you downloaded. It will expand into
  a folder called "Python mmide".
 
 You need to download the PyGUI framework
  from the web site located at:
  
  http://www.cosc.canterbury.ac.nz/~greg/python_gui/

 Copy the folder GUI from the PyGUI folder
  into the folder "Python mmide".
  
 Run the Python program mmide.py using your
  favorite method. You need to insure that
  pythonw is used, not python, since the
  program uses the Cocoa graphical framework.
  
 Close the initial window named "set.mms"

 Using the program file menu, open the
  metamath database file "miu.mms"
  located in the "Python mmide" folder.

Using the program project menu, compile
  the program.
  
 If you wish, you can now save the compiled
  program using the project menu. The name
  of the compiled program will have "mmo" as
  its file extension. The next time you run
  the mmide program, you can just load the
  compiled program.

 Now type "theorem1" in the window's label
  field and hit the enter key. You can use
  the "Statement" and "Proof" menus to
  toggle what is displayed.
  
Of course, it is better to view the
  metamath database file set.mm. You need
  to download the metamath system from
  the web site located at:
  
  http://us.metamath.org/index.html
  
  Note that you have to convert the file
  set.mm from its compressed format into
  its uncompressed format, naming it
  "set.mms". Be sure that the "mm"
  extension is no longer present.
  Otherwise, the mmide program will
  not recognize it as a valid database
  file when you try to open it.