Good, only, but not quite cheap way to upgrade its MacBook Pro Retina (Model 2012/13) to approximately 960 GB SSD. On the internet pages of Transcend you get all the necessary information, and a detailed video instructions for both the 13-inch, as well as for the 15-inch version. Securing the original as well as the installation of the new SSD works simply and easily. The included tool fits well. One point deduction there, because the current Transcend JetDrive Toolbox Software 1.6 (download) to activate the accelerating Trim function works with OSX 10.9.4 not. Was also criticized before. You can see the software while installing, adjust the slider to trim, but the function is not activated in apparently OSX, the MacBook continues to respond very slowly. I then the freeware Trim Enabler loaded by the Swedish software company cindori.org, with who has the permanent switching on the trim function then worked flawlessly. The Transcend SSD is comparable fast as the original built Samsung SSD.
