fixed let-simproc
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<title>MacOS X Emacs hints</title>
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<h2>MacOS X Emacs hints</h2>
<p>Assuming you have an installation of Isabelle on your Mac,
there are various possibilites for running ProofGeneral:</p>
<ul>
<li>You should also be able to launch <a href=
"http://proofgeneral.inf.ed.ac.uk/">Proof General</a> by typing
<tt class="shellcmd">Isabelle</tt> at the Unix command line. This will invoke the
Apple-supplied version of Emacs in a terminal window, providing a primitive
environment.</li>
<li>Somewhat better is to run Proof General from within a version
of Emacs ported as a native Mac OS X application, such as <a href=
"http://home.att.ne.jp/alpha/z123/emacs-mac-e.html">MacEmacs JP</a> or
<a href="http://mindlube.com/products/emacs/">mindlube's</a> or <a href=
"http://www.cs.man.ac.uk/%7efranconi/mac-emacs/">Enhanced Carbon Emacs</a>.
Visiting a theory file from Emacs will automatically launch Proof General
provided <tt class="shellcmd">isabelle</tt> is on the search path. None of these options
support the X-Symbol package, unfortunately.</li>
<li>In order to get the full benefit of Proof General, you must install the X
Window System (X11) and <a href="http://www.xemacs.org/">XEmacs</a> or
<a href="http://www.gnu.org/software/emacs/emacs.html">GNU Emacs</a>.</li>
<ul>
<li>
<a href="http://www.apple.com/macosx/x11/">apple's version of X11</a>
is included with the Panther (MacOS X 10.3) installation discs, though it is
not installed by default. The Command key serves as Meta, but it is
reserved for standard Apple shortcuts such as C, V and X, so you must use
Esc-C, Esc-V and Esc-X in Emacs or else deselect »Enable key equivalents«
in the X11 preferences.</li>
<li>The easiest way to install XEmacs or GNU Emacs is via the package manager
<a href="http://fink.sourceforge.net/">Fink</a>. Install the Fink package
<tt>xemacs-sumo-pkg</tt> to get the XEmacs libraries that Proof General needs
to run. To install GNU Emacs, install the package <tt>emacs21</tt>. Fink can
compile from sources, but this takes hours, so it is better to request binary
installations.</li>
<li>To use <a href="http://www.gnu.org/software/emacs/emacs.html">GNU
Emacs</a> instead of <a href="http://www.xemacs.org/">XEmacs</a>, you must
recompile Proof General and X-Symbol following the instructions <a href=
"http://proofgeneral.inf.ed.ac.uk/FAQ">here</a>. Note that Proof General
incorporates its own copy of X-Symbol.</li>
</ul>
</ul>
<p>You may want to install this drag-and-drop <a href=
"//misc/isabelle_droplet.dmg">Isabelle launcher</a>. It is a simple hack that
invokes XEmacs on any files dropped on it.</p>
<p>Here is a <a href=
"//img/screenshot_isabelle_macos.gif">screenshot</a> showing Proof General running
in GNU Emacs.</p>
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