Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
Also add tests in the OS X installer build to ensure that the desired
dynamic linking with an optional newer Tcl/Tk in /Library actually
happens.
diff --git a/setup.py b/setup.py
index c7c5929..d419d48 100644
--- a/setup.py
+++ b/setup.py
@@ -69,7 +69,9 @@
     """
     Returns True if 'path' can be located in an OSX SDK
     """
-    return (path.startswith('/usr/') and not path.startswith('/usr/local')) or path.startswith('/System/')
+    return ( (path.startswith('/usr/') and not path.startswith('/usr/local'))
+                or path.startswith('/System/')
+                or path.startswith('/Library/') )
 
 def find_file(filename, std_dirs, paths):
     """Searches for the directory where a given file is located,