UIMA-2314 updated to indicate the source build has not been teste on Mac OS.

git-svn-id: https://svn.apache.org/repos/asf/uima/uimacpp/trunk@1237936 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/README.4src b/README.4src
index f508a89..43f3690 100644
--- a/README.4src
+++ b/README.4src
@@ -116,6 +116,9 @@
 
 Building, testing and packaging on Mac OSX:
 -------------------------------------------
+
+These instructions should work on the Max OSX but have not been tested. 
+
 Except for one problem with APR, building is the same here as on Linux.
 For the Intel-based Mac OSX machines we have tested with, the APR function
 to dynamically load shared libraries does not respect DYLD_LIBRARY_PATH.