Just as the title says. I just realized my MacBook Pro 15" 2012 Mountain Lion had the Silverlight process idling at 21-25% CPU usage. That's so dumb why is it even necessary to even be idling at that capacity. I also checked my 2011 27" iMac on Snow Leopard and I see identical symptoms. I've removed, reinstalled, updated and still the same thing is happening. Can y'all check your Activity Monitor and see if you're getting the same thing for those that have the Silverlight plugin installed. Thanks.