Where do I find the "new USB enhanced package that you can install with it"?
A link please, or, a PM.
Thanks...
ETA: I have tracked down the issue. It seems clear that USB between VB 5.0.6 and OS 10.11 (El Capitan) is acknowledged to be "broken". That is with and without the 5.0.6 Extension Pack installed.
Three alternatives for anyone (like me) who made the leap to El Capitan:
(1) Back out of 10.11 and reinstall Yosemite, relying on Time Machine to replace files;
(2) Wait for the VirtualBox USB fix;
(3) Limp along using Win XP, if you have a box like that. I do and will limp along, waiting for the USB fix...