My drive has been recognized up until today when I powered on my late 2011 Macbook Pro 13 on. I have tried removing and reinserting the USB to the hub and the ports on the side of the laptop. As a side note, I am also using an external monitor. Not sure if I need to get it recognized by doing things in any particular order. The drive has power and the light is on in the front of the drive. I have been using this drive as a Timeline backup.