Hello, I just install a new Crucial M4 256GB in my new MacBook Pro 15" 2012 (of course, not a Rétina). It try to enable TRIM with lastest TRIM enabler but it does not work. TRIM stay disable. I'am not commun with Lion, I noticed my MacBook Pro runs OS X 10.7.4 11E2617 witch is different from the App Store one. PS :Sorry for poor english.