diff --git a/mac/rungramps.py b/mac/rungramps.py
index 2b98b3eb0..ac948eab4 100755
--- a/mac/rungramps.py
+++ b/mac/rungramps.py
@@ -18,6 +18,7 @@ sys.path = [_gramps_path,
             _site_lib_path,
             _pylib_path]
 
+sys.prefix = _res_path
 os.environ["GTK_PATH"] = _res_path
 os.environ["GTK2_RC_FILES"] = os.path.join(_gtk2_conf, "gtkrc")
 os.environ["GTK_IM_MODULE_FILE"]= os.path.join(_gtk2_conf, "immodules")
@@ -125,7 +126,7 @@ else:
     LC_ALL = _language
 
 os.environ["LC_ALL"] = LC_ALL #Spell-checker dictionary support
-print LANG, LC_ALL
+
 #LaunchServices sticks this argument on the front of argument
 #lists. It must make sense to somebody, but Gramps isn't that
 #somebody.
diff --git a/src/const.py.in b/src/const.py.in
index f8c67b41c..1f737f815 100644
--- a/src/const.py.in
+++ b/src/const.py.in
@@ -80,10 +80,13 @@ APP_VCARD       = ["text/x-vcard", "text/x-vcalendar"]
 # system paths
 #
 #-------------------------------------------------------------------------
-if sys.platform == "win32" or sys.platform == "darwin":
+if sys.platform == "win32":
     if sys.prefix == os.path.dirname(os.getcwd()):
         PREFIXDIR = sys.prefix
         SYSCONFDIR = os.path.join(sys.prefix, "etc")
+elif  sys.platform == "darwin" and sys.prefix != sys.exec_prefix:
+    PREFIXDIR = sys.prefix
+    SYSCONFDIR = os.path.join(sys.prefix, "etc")
 else:
     PREFIXDIR = "@prefix@"
     SYSCONFDIR = "@sysconfdir@"