OWC Hard Drive Bracket for Mac Pro 2009, 2010, 2012 Hard Drive Sled / Bracket for Mac Pro 2009 & 2012 'Westmere' & 'Nehalem' Models ONLY Updated for 2015, the OWC Hard Drive Bracket is the new universal standard to install any SATA hard drive in a Mac Pro tower With screw mounting holes for all SATA drives, it's the drive sled built for compatibility, flexibility, and ease of use Compatible with Mac Pro (2009-2012, Model IDs: MacPro4,1 MacPro5,1 1 Year OWC Limited Warranty Rotate backups Separate storage for individual clients or large projects Simple, inexpensive way to transfer large files between two Mac Pro models Utilize all 3.5&#034; SATA and SAS drives including newer models of 6.0TB and larger capacities utilizing the new screw hole mounting pattern. Hard Drive Bracket. Four hard drive mounting screws. Six vibration isolating rubber grommets. Mac Pro (Early 2009 Quad-Core)<span class="a-text-bold">Model ID:</span>MacPro4,1(2.66GHz, 2.93GHz, 3.33GHz) Mac Pro (Early 2009 8-Core)<span class="a-text-bold">Model ID:</span>MacPro4,1(2.26GHz, 2.66GHz, 2.93GHz) Mac Pro (Mid 2010 Quad-Core)<span class="a-text-bold">Model ID:</span>MacPro5,1(2.8GHz, 3.2GHz, 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)