MCE Technologies MCE OptiBay - Optical Bay Drive Kit 2nd Hard Disk/SSD Caddy, Add a 2nd Hard Disk or SSD to your (pre-Unibody) Apple MacBook Pro 15" Add a second hard drive or SSD (not included) to your (non-Unibody) MacBook Pro 15", or MacBook 13" (White/Black, 2006-2008) Includes Illustrated Installation Guide and Installation Tool kit... no extra hardware required Compatible with all Mac OS (Including El Capitan, Mac OS 10.11) and Windows operating systems Includes MCE OptiBay Utility Application which allows you to continue to use the Apple DVD Player application with your external SuperDrive (DVD drive). Toll Free Technical Support. Lifetime Warranty. Hard drive or SSD to be installed in the OptiBay must be 2.5", SATA, 9.5mm in height or less.