Apple Mac Pro 4,1 640GB 3.5" SATA HDD Hard Drive with OS El Capitan installed
3.5" 640GB SATA Hard Drive. Western Digital WD Caviar SE16 640GB. with Mac OS El Capitan pre-installed. SATA Desktop Hard Drive 3.5". Apple Mac Pro 4,1. HDD - 122-3 - Sold 040625. HDD - 122-4 S/N WMASY7992090 - Sold 290925.