Compatible with macbook models:
macbookpro 5.5 -- macbook pro 13 inch a1278 mid 2009
macbookpro 7.1 -- macbook pro 13 inch a1278 mid 2010
macbookpro 8.1 -- macbook pro 13 inch a1278 early 2011 & late 2011
macbookpro 9.2 -- macbook pro 13 inch a1278 mid 2012
emc 2554,2419,2351,2326