diff --git a/Mac/Lib/macfsn.py b/Mac/Lib/macfsn.py
index f7b6b2eec8f..3c126465ede 100644
--- a/Mac/Lib/macfsn.py
+++ b/Mac/Lib/macfsn.py
@@ -129,6 +129,7 @@ if Nav and Nav.NavServicesAvailable():
 	StandardPutFile = _StandardPutFile
 	SetFolder = _SetFolder
 	GetDirectory = _GetDirectory
+	_install()
 else:
 	from macfs import StandardGetFile, PromptGetFile, StandardPutFile, SetFolder, GetDirectory