Last March, we purchased a 2011 iMac with 4GB of RAM. We then decided to buy an additional 4GB from OWC. Long story short, we hit a finacial snag and had to return the iMac. That same day, we got the new RAM in the mail. Fast forward to today, we bought a new 2012 MBP, non-retina, and I thought of the RAM issue. The MBP has 8GB but I was thinking I could put that extra 4GB to use. But I don't know if the RAM is compatible. Does anyone know if it is or not? If it isn't no big deal. It has just been sitting in my desk in its shipping wrap for 3 months. The reason why we kept the RAM in the first place was we planned on buying a new iMac when they were refreshed but settled on MBP and MBA instead.