diff --git a/lcl/lclintf.pas b/lcl/lclintf.pas
index 14aded4b43..729074c24e 100644
--- a/lcl/lclintf.pas
+++ b/lcl/lclintf.pas
@@ -320,7 +320,7 @@ end;
 {$IFDEF DARWIN}
 begin
   Result := True;
-  Shell('Open ' + APath);
+  Shell('open ' + APath);
 end;
 {$ELSE}
 var