I have tested this hub on iMac and MacBook Pro with hard drives attached. Drives keep dropping and then sometimes come back. Unreliable for backup. I had this problem on both iMac and MacBook Pro. In fact, I'm worried that the hub actually damaged the USB ports (or the motherboard) on both computers, since using a different hub now shows the same problem - instability when displaying disks - on both computers. This product is covered by the manufacturer's warranty.
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