Answer to: Changing my Hard Drive To a Western Digital Hybrid DriveThere is now support to install Western Digital Black 2 for max OSX simple download Re flash firmware was simple this takes few min 5 ? Two programs utility set drive as two drives or single Fusion drive . I've installed both ways 2 drive instal and the Fusion drive Few things will need to be changed in systems setting Turn on Trim with simple command line instructions or a 3rd party free programs I always choose command like . Performance This drive is mid range for performance index Ssd is around 50% speed performance under Samsung or crucial tops performers . SSD is defently a performer over normal Plater Hard drive! I recommend this drive to all my clients .