NewerTech MAXPower 2 x 2 USB/eSATA PCIe 2.0 Host Adapter for Mac OS X 10.6-10.8.2

Features:PCI Express 2.0 x4;Two USB 3.0 ports with Type A connectors (female);Two 6Gb/s eSATA Ports;20Gb/s transfer bandwidth;Optimized for all USB 3.0 & eSATA storage devices;Backwards compatible with USB 2.0 & 1.1, and eSATA 3Gb/s;Hot-Swap and Hot-Plug. Designed specifically for OS X 10.6 - 10.8.2, the MAXPower USB/eSATA 2x2 Host Adapter for OS X 10.6 - 10.8.2 comes with a custom built driver and is the perfect companion card for systems which still require a legacy OS. USB 3.0: up to 500MB/s per port. Sleep is not supported with this Card.