Add instructions for starting the GUI on Mac OS X to README.txt.

diff --git a/README.txt b/README.txt
index c6c9a4cf2d305e5de916f95e17fd7b30b9706405..1b69448f8d06d5726ffe0e00b22aa8592c5393b9 100644 (file)
--- a/README.txt
+++ b/README.txt
@@ -94,12 +94,20 @@ To run the Factor system, issue the following command:
 This will start the interactive listener where Factor expressions may
 be entered.
 
-To run the graphical user interface, issue the following command:
+To run the graphical user interface on non-Mac OS X systems, issue the
+following command:
 
   ./f factor.image -shell=ui
 
 Note that on Windows, this is the default.
 
+To prepare to run the GUI on Mac OS X, issue the following command:
+
+  make macosx.app
+
+once after bootstrapping, then double-click the Factor application to
+run it.
+
 On Unix, this might fail if the SDL libraries are not installed, or are
 installed under unconventional names. This can be solved by explicitly
 naming the libraries during bootstrap, as in the next section.