Installed on a MacBook Pro 13.3 "early 2011. An update to the latest firmware was necessary (if not the mac" freezait "regularly) After that:. Boot in ten seconds extinction in less than five seconds, applications embark very quickly and turn to coat. The Mac was already relatively efficient on these points, it is now even better. I do not regret the investment 150. This is not the best performing SSD to Currently (even if its performance is already very good), but it has good press about the reliability, its price is more competitive and for the upgrade in question it seems to me perfectly adequate. Note: upgrade parallel with these 8GB Corsair - CMSO8GX3M2A1333C9 - RAM Memory - DDR3 SO 1333-8 GB (2 x 4GB)