Hi Guys & Girls, I would love to know who has a stable & perfectly running system using USB 3.0 hubs? I just upgraded to a mid 2012 13" Macbook Pro with (2) USB 3.0 unfortunately I am having externally connected USB Hub 3.0 problems with "disconnecting" and general "stability" issues. This is with (2) newly purchased USB 3.0 Hubs with external power source attached to the hubs. I decided to upgrade to El Capitan, and have had nothing but issues with notifications about the drives disconnecting and being improperly disconnected, OR being recognized as USB 2.0 devices (when it's clearly a 3.0 device). I need my MB Pro to work correctly and not cause data corruption, so I need to find a solution OR downgrade to Yosemite (via a Carbon Copy Clone). Please VOTE, and any feedback would be greatly appreciated. UPDATE: I have finally solved the issue, details are in Post# 12.