Just installed a Crucial 512GB M4 in My 2011 17" I7 MacBook Pro, I was starting to get worried as it seems the 17" has a lot of troubles with Sata3 SSD's So far its fast and flawless, no beach balls, nothing weird. Here is what I did. * Before I cloned my HD I updated the firmware to the latest version. * I went to Home Depot and purchased some aluminum tape (used for sealing duct work in houses $9 for like a roll, enough to do 500 laptops.) Like aluminum foil but thicker metal. * Shielded the Sata cable with the aluminum tape. * Cloned Drive * Enabled Trim in Terminal So far so good.... (About 2 hours) I'll keep my fingers crossed.