diff --git a/homeassistant/__main__.py b/homeassistant/__main__.py
old mode 100644
new mode 100755
index 8c282c736b51..93409ec5d668
--- a/homeassistant/__main__.py
+++ b/homeassistant/__main__.py
@@ -7,6 +7,7 @@ import sys
 import threading
 import os
 import argparse
+import time
 
 from homeassistant import bootstrap
 import homeassistant.config as config_util
@@ -299,6 +300,8 @@ def main():
         return 0
     if args.restart_osx:
         uninstall_osx()
+        # A small delay is needed on systems to let the unload finish.
+        time.sleep(0.5)
         install_osx()
         return 0