diff -r 664e24207728 -r 9fb85668ee15 mercurial/utils/resourceutil.py
--- a/mercurial/utils/resourceutil.py	Thu Nov 14 11:52:22 2019 -0800
+++ b/mercurial/utils/resourceutil.py	Thu Nov 14 12:33:10 2019 -0800
@@ -10,6 +10,7 @@
 from __future__ import absolute_import
 
 import imp
+import os
 import sys
 
 from .. import pycompat
@@ -26,3 +27,11 @@
         or pycompat.safehasattr(sys, "importers")  # new py2exe
         or imp.is_frozen("__main__")  # old py2exe
     )  # tools/freeze
+
+
+# the location of data files matching the source code
+if mainfrozen() and getattr(sys, 'frozen', None) != 'macosx_app':
+    # executable version (py2exe) doesn't support __file__
+    datapath = os.path.dirname(pycompat.sysexecutable)
+else:
+    datapath = os.path.dirname(os.path.dirname(pycompat.fsencode(__file__)))