diff --git a/kaki/app.py b/kaki/app.py
index beec0b2..28a06aa 100644
--- a/kaki/app.py
+++ b/kaki/app.py
@@ -19,6 +19,7 @@
 from kivy.factory import Factory
 from kivy.lang import Builder
 from kivy.base import ExceptionHandler, ExceptionManager
+from kivy.utils import platform
 try:
     from monotonic import monotonic
 except ImportError:
@@ -254,6 +255,7 @@ def _reload_from_watchdog(self, event):
             except Exception as e:
                 import traceback
                 self.set_error(repr(e), traceback.format_exc())
+                print(f"Error: {e} \n{traceback.format_exc()}")
                 return
 
         Logger.debug("{}: Reload triggered by {}".format(self.appname, event))
@@ -306,9 +308,13 @@ def _filename_to_module(self, filename):
         rootpath = self.get_root_path()
         if filename.startswith(rootpath):
             filename = filename[len(rootpath):]
-        if filename.startswith(os.path.sep):
+        if platform == 'macosx':
+            prefix = os.sep
+        else:
+            prefix = os.path.sep
+        if filename.startswith(prefix):
             filename = filename[1:]
-        module = filename[:-3].replace(os.path.sep, ".")
+        module = filename[:-3].replace(prefix, ".")
         Logger.debug("{}: Translated {} to {}".format(
             self.appname, orig_filename, module))
         return module