Newer Tech eSATA Extender Cable Adapter for Mac Pro Adds (2) 3Gb/s eSATA ports to your Mac Pro Adds 2 eSATA ports (by extended 2 x unused 'hidden' SATA ports) for Mac Pro 2006 to 2008 Models (Models MacPro1,1; 2,1; 3,1) Adds 1 eSATA port (by extended 1 x unused 'hidden' SATA ports) for Mac Pro 2009 to 2012 Models (Models MacPro 4,1;5,1) Not for Mac Pro 2013 or later (MacPro6,1 model) Includes NewerTech eSATA Extender Cable, Full Color Installation Guide, 1 Year NewerTech Product Limited Warranty Up to two (2) External eSATA SATA 3Gb/s External - One SATA device per port Internal - None Internal SATA bus Standard PCI Up to 3.0Gb/s Hardware: Intel-based Mac with available PCIe 2.0 or 1.0 slot Operating System: Mac OS X 10.5.x and later Not Supported No The 2009 &amp; 2010 Mac Pro comes stock with one available SATA port with the other used for the stock optical drive connection. This product can be used in lieu of a second optical drive. Remove one of the SATA connections from the eSATA Extender Cable when using only one eSATA connection Unused onboard SATA ports this device uses will only function when booted in OS X in 2006-2009 Mac Pro models. The NewerTech eSATA Extender Cable A full color installation guide Adds two 3Gb/s eSATA ports to your Mac Pro 18 inch cable length Mac Pro(August, 2006)<span class="a-text-bold">Model ID:</span>MacPro1,1(2.0GHz, 2.66GHz, 3.0GHz) Mac Pro (8-core)(April, 2007)<span class="a-text-bold">Model ID:</span>MacPro2,1.(3.0GHz) Mac Pro (Early 2008)<span class="a-text-bold">Model ID:</span>MacPro3,1(2.8GHz, 3.0GHz, 3.2GHz) Mac Pro (Early 2009 Quad-Core)<span class="a-text-bold">Model ID:</span>MacPro4,1(2.66GHz, 2.93GHz, 3.33GHz) Mac Pro (Mid 2010 Quad-Core)<span class="a-text-bold">Model ID:</span>MacPro5,1(2.8GHz, 3.2GHz, 3.33GHz) Mac Pro 6-Core(Mid 2010-2012)<span class="a-text-bold">Model ID:</span>MacPro5,1(3.33GHz) Mac Pro 8-Core (Mid 2010)<span class="a-text-bold">Model ID:</span>MacPro5,1(2.4GHz) Mac Pro 12-Core(Mid 2010-2012)<span class="a-text-bold">Model ID:</span>MacPro5,1(2.40GHz, 2.66GHz, 2.93GHz, 3.06GHz)