There didn’t appear to be many people talking about Corsair CMSO4GX3M1A1333C9 4GB PC-10600 and it’s compatibility with 2011 MacBook Pros, so I thought I’d write a quick post about it. I bought 4 of these sticks, 2 for my 13″ 2.7GHz i7 MacBook Pro (8,1), and 2 for another 15″ 2.2GHz i7 Macbook Pro. We put them in and our MacBooks booted perfectly, neither machines have had any issues, so I’m confident to say that these modules work great in 2011 MacBook Pros. Despite the fact I never actually reached 4GB usage on the standard RAM, my MacBook feels snappier and quicker to boot. It’s probably just a placebo though. Either way, at $45 AUD a pop (so, $90 AUD to upgrade to 8GB), these modules are great value and well worth the upgrade.