diff --git a/scripts/macosx-sanity-check.py b/scripts/macosx-sanity-check.py
new file mode 100755
index 00000000..24389065
--- /dev/null
+++ b/scripts/macosx-sanity-check.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+
+#
+# This is be used to verify that all the dependant libraries of a  Mac OS X executable 
+# are present and that they are backwards compatible with at least 10.5.
+# Run with an executable as parameter
+#
+
+import sys
+import os
+import subprocess
+import re
+
+DEBUG = False
+
+def usage():
+    print >> sys.stderr, "Usage: " + sys.argv[0] + " <executable>"
+    sys.exit(1)
+
+# Try to find the given library by searching in the typical locations
+# Returns the full path to the library or None if the library is not found.
+def lookup_library(file):
+    found = None
+    if not re.match("/", file):
+        if re.search("@executable_path", file):
+            abs = re.sub("^@executable_path", executable_path, file)
+            if os.path.exists(abs): found = abs
+            if DEBUG: print "Lib in @executable_path found: " + found
+        elif re.search("\.app/", file):
+            found = file
+            if DEBUG: print "App found: " + found
+        elif re.search("\.framework/", file):
+            found = os.path.join("/Library/Frameworks", file)
+            if DEBUG: print "Framework found: " + found
+        else:
+            for path in os.getenv("DYLD_LIBRARY_PATH").split(':'):
+                abs = os.path.join(path, file)
+                if os.path.exists(abs): found = abs
+            if DEBUG: print "Library found: " + found
+    else:
+        found = file
+    return found
+
+# Returns a list of dependent libraries, excluding system libs
+def find_dependencies(file):
+    libs = []
+
+    p = subprocess.Popen(["otool", "-L", file], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    output = p.communicate()[0]
+    if p.returncode != 0: return None
+    deps = output.split('\n')
+    for dep in deps:
+#        print dep
+        dep = re.sub(".*:$", "", dep) # Take away header line
+        dep = re.sub("^\t", "", dep) # Remove initial tabs
+        dep = re.sub(" \(.*\)$", "", dep) # Remove trailing parentheses
+        if len(dep) > 0 and not re.search("/System/Library", dep) and not re.search("/usr/lib", dep):
+            libs.append(dep)
+    return libs
+
+def validate_lib(lib):
+    p  = subprocess.Popen(["otool", "-l", lib], stdout=subprocess.PIPE)
+    output = p.communicate()[0]
+    if p.returncode != 0: return False
+    if re.search("LC_DYLD_INFO_ONLY", output):
+        print "Error: Requires Snow Leopard: " + lib
+        return False
+    return True
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2: usage()
+    executable = sys.argv[1]
+    if DEBUG: print "Processing " + executable
+    executable_path = os.path.dirname(executable)
+    # processed is a dict {libname : [parents]} - each parent is dependant on libname
+    processed = {}
+    pending = [executable]
+    while len(pending) > 0:
+        dep = pending.pop()
+        if DEBUG: print "Evaluating " + dep
+        deps = find_dependencies(dep)
+        assert(deps)
+        for d in deps:
+            absfile = lookup_library(d)
+            if absfile == None:
+                print "Not found: " + d
+                print "  ..required by " + str(processed[dep])
+                continue
+            if absfile in processed:
+                processed[absfile].append(dep)
+            else: 
+                processed[absfile] = [dep]
+                if DEBUG: print "Pending: " + absfile
+                pending.append(absfile)
+
+    for dep in processed:
+       if DEBUG: print "Validating: " + dep
+#        print "     " + str(processed[dep])
+       if not validate_lib(dep):
+           print "..required by " + str(processed[dep])