diff --git a/build/osx/readme.txt b/build/osx/readme.txt
index f4ef043ceb..2495a72146 100644
--- a/build/osx/readme.txt
+++ b/build/osx/readme.txt
@@ -17,4 +17,19 @@ reads in the files lists from the files.bkl in the build/bakefiles directory, ev
 conditions in these definitions and then adds the correct files to the newly created XCode
 projects
 
+if you only need a specific target and not all three of them (carbon, cocoa, iphone) then you can 
+comment the unneeded makeProject calls.
+
+Prerequisites
+-------------
+
+you need the xml scripting additions from latenightsw, 
+
+http://www.latenightsw.com/freeware/XMLTools2/index.html
+
+currently the 2.9.3 version available from that download is not appropriate for OS X 10.6, you
+can download a beta from a newer version here:
+
+http://www.latenightsw.com/blog/?p=231
+
 Stefan Csomor