Hey guys, I have a super old Macbook Pro from mid-2009 (MB990LL/A). Recently bought 2x4GB Crucial DDR3L 1600 RAM. From what I read, the RAM should have been compatible, even though it was DDR3L. This is the product here: http://www.newegg.com/Product/Produ...-cables-_-na-_-na&Item=N82E16820148807&cm_sp= Sadly, when I installed the RAM the laptop doesn't boot and just makes the beeping noise. Tried it with one 4GB stick, and then the other, same result. I suppose the RAM just isn't compatible? Anyone have experience with DDR3L RAM in these old Macbook Pros? Thanks.