I took advantage of an offer to buy the Flash Evo SSd 850,500, I left on the Crucial MX 100 which is a reference, but it is superior in every way. Installed on a Macbook Pro Retina non Usb 3, more interesting to me because not closed. The procedure is so easy: you connect it to an external SSd box, you format using the Disk Utility and then you put it in your Macbook, you connect the network cable, faster than WiFi, and you will make a nap, 2 or 3 hours later, your system will be up and running ... It's Magic ... What happiness !! When Trim Enabler, I'm not sure that with this SSd they be useful, to do so. @ +