I changed my original Toshiba HDD on a Macbook because it was moving too slow and load cycle count was too high. Now I was trying to use this HDD as external using a cheap USB Sata adapter. However, I'm able to browse the content for a little time, but it gets disconnected too quick and this loop keeps going. I wonder if I should try to use the additional USB part of the cable to power it of if I should not even take the risk. The original HDD requires only 5V, 1A I dont think the HDD is the problem here. edit: I just observed that OSX support is not even mentioned on eBay products page and only windows, but I was able to view the content for a short time.