Index: /trunk/src/VBox/Main/src-server/darwin/iokit.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/darwin/iokit.cpp	(revision 59331)
+++ /trunk/src/VBox/Main/src-server/darwin/iokit.cpp	(revision 59332)
@@ -1025,5 +1025,6 @@
                                             &bSpeed));
                 Assert(bSpeed <= 4);
-                pCur->enmSpeed = bSpeed == 3 || bSpeed == 4 ? USBDEVICESPEED_SUPER
+                pCur->enmSpeed = bSpeed == 4 ? USBDEVICESPEED_SUPER /** @todo: Check what 4 really means (USB 3.1 perhaps?), seen on El Capitan. */
+                               : bSpeed == 3 ? USBDEVICESPEED_SUPER
                                : bSpeed == 2 ? USBDEVICESPEED_HIGH
                                : bSpeed == 1 ? USBDEVICESPEED_FULL