Index: /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp	(revision 42387)
+++ /trunk/src/VBox/Main/src-server/SystemPropertiesImpl.cpp	(revision 42388)
@@ -1180,6 +1180,10 @@
     {
         int vrc = autostartDb->setAutostartDbPath(NULL);
-        /* AssertRC(vrc); - VERR_NOT_IMPLEMENTED on Mac OS X and thus strict builds crashes. */
-        m->strAutostartDatabasePath = "";
+        if (RT_SUCCESS(vrc))
+            m->strAutostartDatabasePath = "";
+        else
+            rc = setError(E_FAIL,
+                          tr("Deleting the autostart database path failed (%Rrc)"),
+                          vrc);
     }